diff --git a/native/chat/chat.react.js b/native/chat/chat.react.js
index 057180482..717a783af 100644
--- a/native/chat/chat.react.js
+++ b/native/chat/chat.react.js
@@ -1,361 +1,372 @@
 // @flow
 
 import {
   createMaterialTopTabNavigator,
   type MaterialTopTabNavigationProp,
 } from '@react-navigation/material-top-tabs';
 import {
   createNavigatorFactory,
   useNavigationBuilder,
   type StackNavigationState,
   type StackOptions,
   type StackNavigationEventMap,
   type StackNavigatorProps,
   type ExtraStackNavigatorProps,
   type StackHeaderProps as CoreStackHeaderProps,
   type StackNavigationProp,
   type StackNavigationHelpers,
   type ParamListBase,
 } from '@react-navigation/native';
 import { StackView, type StackHeaderProps } from '@react-navigation/stack';
 import invariant from 'invariant';
 import * as React from 'react';
 import { Platform, View, useWindowDimensions } from 'react-native';
 import { useSelector } from 'react-redux';
 
 import ThreadDraftUpdater from 'lib/components/thread-draft-updater.react.js';
 import { isLoggedIn } from 'lib/selectors/user-selectors.js';
 import {
   threadIsPending,
   threadMembersWithoutAddedAshoat,
 } from 'lib/shared/thread-utils.js';
 
 import BackgroundChatThreadList from './background-chat-thread-list.react.js';
 import ChatHeader from './chat-header.react.js';
 import ChatRouter, { type ChatRouterNavigationHelpers } from './chat-router.js';
 import ComposeSubchannel from './compose-subchannel.react.js';
 import ComposeThreadButton from './compose-thread-button.react.js';
+import FullScreenThreadMediaGallery from './fullscreen-thread-media-gallery.react.js';
 import HomeChatThreadList from './home-chat-thread-list.react.js';
 import MessageListContainer from './message-list-container.react.js';
 import MessageListHeaderTitle from './message-list-header-title.react.js';
 import MessageStorePruner from './message-store-pruner.react.js';
 import DeleteThread from './settings/delete-thread.react.js';
 import ThreadSettings from './settings/thread-settings.react.js';
 import ThreadScreenPruner from './thread-screen-pruner.react.js';
 import ThreadSettingsButton from './thread-settings-button.react.js';
 import ThreadSettingsHeaderTitle from './thread-settings-header-title.react.js';
 import KeyboardAvoidingView from '../components/keyboard-avoiding-view.react.js';
 import SWMansionIcon from '../components/swmansion-icon.react.js';
 import { InputStateContext } from '../input/input-state.js';
 import CommunityDrawerButton from '../navigation/community-drawer-button.react.js';
 import type { CommunityDrawerNavigationProp } from '../navigation/community-drawer-navigator.react.js';
 import HeaderBackButton from '../navigation/header-back-button.react.js';
 import { defaultStackScreenOptions } from '../navigation/options.js';
 import {
   ComposeSubchannelRouteName,
   DeleteThreadRouteName,
   ThreadSettingsRouteName,
+  FullScreenThreadMediaGalleryRouteName,
   MessageListRouteName,
   ChatThreadListRouteName,
   HomeChatThreadListRouteName,
   BackgroundChatThreadListRouteName,
   type ScreenParamList,
   type ChatParamList,
   type ChatTopTabsParamList,
 } from '../navigation/route-names.js';
 import { useColors, useStyles } from '../themes/colors.js';
 
 const unboundStyles = {
   keyboardAvoidingView: {
     flex: 1,
   },
   view: {
     flex: 1,
     backgroundColor: 'listBackground',
   },
   threadListHeaderStyle: {
     elevation: 0,
     shadowOffset: { width: 0, height: 0 },
     borderBottomWidth: 0,
     backgroundColor: 'tabBarBackground',
   },
 };
 
 export type ChatTopTabsNavigationProp<
   RouteName: $Keys<ChatTopTabsParamList> = $Keys<ChatTopTabsParamList>,
 > = MaterialTopTabNavigationProp<ScreenParamList, RouteName>;
 
 const homeChatThreadListOptions = {
   title: 'Focused',
   // eslint-disable-next-line react/display-name
   tabBarIcon: ({ color }) => (
     <SWMansionIcon name="home-1" size={22} style={{ color }} />
   ),
 };
 const backgroundChatThreadListOptions = {
   title: 'Background',
   // eslint-disable-next-line react/display-name
   tabBarIcon: ({ color }) => (
     <SWMansionIcon name="bell-disabled" size={22} style={{ color }} />
   ),
 };
 
 const ChatThreadsTopTab = createMaterialTopTabNavigator();
 function ChatThreadsComponent(): React.Node {
   const colors = useColors();
   const { tabBarBackground, tabBarAccent } = colors;
   const screenOptions = React.useMemo(
     () => ({
       tabBarShowIcon: true,
       tabBarStyle: {
         backgroundColor: tabBarBackground,
       },
       tabBarItemStyle: {
         flexDirection: 'row',
       },
       tabBarIndicatorStyle: {
         borderColor: tabBarAccent,
         borderBottomWidth: 2,
       },
     }),
     [tabBarAccent, tabBarBackground],
   );
   return (
     <ChatThreadsTopTab.Navigator screenOptions={screenOptions}>
       <ChatThreadsTopTab.Screen
         name={HomeChatThreadListRouteName}
         component={HomeChatThreadList}
         options={homeChatThreadListOptions}
       />
       <ChatThreadsTopTab.Screen
         name={BackgroundChatThreadListRouteName}
         component={BackgroundChatThreadList}
         options={backgroundChatThreadListOptions}
       />
     </ChatThreadsTopTab.Navigator>
   );
 }
 
 export type ChatNavigationHelpers<ParamList: ParamListBase = ParamListBase> = {
   ...$Exact<StackNavigationHelpers<ParamList>>,
   ...ChatRouterNavigationHelpers,
 };
 
 type ChatNavigatorProps = StackNavigatorProps<ChatNavigationHelpers<>>;
 function ChatNavigator({
   initialRouteName,
   children,
   screenOptions,
   defaultScreenOptions,
   screenListeners,
   id,
   ...rest
 }: ChatNavigatorProps) {
   const { state, descriptors, navigation } = useNavigationBuilder(ChatRouter, {
     id,
     initialRouteName,
     children,
     screenOptions,
     defaultScreenOptions,
     screenListeners,
   });
 
   // Clear ComposeSubchannel screens after each message is sent. If a user goes
   // to ComposeSubchannel to create a new thread, but finds an existing one and
   // uses it instead, we can assume the intent behind opening ComposeSubchannel
   // is resolved
   const inputState = React.useContext(InputStateContext);
   invariant(inputState, 'InputState should be set in ChatNavigator');
   const clearComposeScreensAfterMessageSend = React.useCallback(() => {
     navigation.clearScreens([ComposeSubchannelRouteName]);
   }, [navigation]);
   React.useEffect(() => {
     inputState.registerSendCallback(clearComposeScreensAfterMessageSend);
     return () => {
       inputState.unregisterSendCallback(clearComposeScreensAfterMessageSend);
     };
   }, [inputState, clearComposeScreensAfterMessageSend]);
 
   return (
     <StackView
       {...rest}
       state={state}
       descriptors={descriptors}
       navigation={navigation}
       detachInactiveScreens={Platform.OS !== 'ios'}
     />
   );
 }
 const createChatNavigator = createNavigatorFactory<
   StackNavigationState,
   StackOptions,
   StackNavigationEventMap,
   ChatNavigationHelpers<>,
   ExtraStackNavigatorProps,
 >(ChatNavigator);
 
 const header = (props: CoreStackHeaderProps) => {
   // Flow has trouble reconciling identical types between different libdefs,
   // and flow-typed has no way for one libdef to depend on another
   const castProps: StackHeaderProps = (props: any);
   return <ChatHeader {...castProps} />;
 };
 
 const messageListOptions = ({ navigation, route }) => {
   const isSearchEmpty =
     !!route.params.searching &&
     threadMembersWithoutAddedAshoat(route.params.threadInfo).length === 1;
 
   const areSettingsEnabled =
     !threadIsPending(route.params.threadInfo.id) && !isSearchEmpty;
 
   return {
     // This is a render prop, not a component
     // eslint-disable-next-line react/display-name
     headerTitle: props => (
       <MessageListHeaderTitle
         threadInfo={route.params.threadInfo}
         navigate={navigation.navigate}
         areSettingsEnabled={areSettingsEnabled}
         isSearchEmpty={isSearchEmpty}
         {...props}
       />
     ),
     headerRight:
       Platform.OS === 'android' && areSettingsEnabled
         ? // This is a render prop, not a component
           // eslint-disable-next-line react/display-name
           () => (
             <ThreadSettingsButton
               threadInfo={route.params.threadInfo}
               navigate={navigation.navigate}
             />
           )
         : undefined,
     headerBackTitleVisible: false,
   };
 };
 const composeThreadOptions = {
   headerTitle: 'Compose chat',
   headerBackTitleVisible: false,
 };
 const threadSettingsOptions = ({ route }) => ({
   // eslint-disable-next-line react/display-name
   headerTitle: props => (
     <ThreadSettingsHeaderTitle
       threadInfo={route.params.threadInfo}
       {...props}
     />
   ),
   headerBackTitleVisible: false,
 });
+const fullScreenThreadMediaGalleryOptions = {
+  headerTitle: 'All Media',
+  headerBackTitleVisible: false,
+};
 const deleteThreadOptions = {
   headerTitle: 'Delete chat',
   headerBackTitleVisible: false,
 };
 
 export type ChatNavigationProp<
   RouteName: $Keys<ChatParamList> = $Keys<ChatParamList>,
 > = {
   ...StackNavigationProp<ScreenParamList, RouteName>,
   ...ChatRouterNavigationHelpers,
 };
 
 const Chat = createChatNavigator<
   ScreenParamList,
   ChatParamList,
   ChatNavigationHelpers<ScreenParamList>,
 >();
 
 type Props = {
   +navigation: CommunityDrawerNavigationProp<'TabNavigator'>,
   ...
 };
 export default function ChatComponent(props: Props): React.Node {
   const styles = useStyles(unboundStyles);
   const colors = useColors();
   const loggedIn = useSelector(isLoggedIn);
   let draftUpdater = null;
   if (loggedIn) {
     draftUpdater = <ThreadDraftUpdater />;
   }
 
   const headerLeftButton = React.useCallback(
     headerProps => {
       if (headerProps.canGoBack) {
         return <HeaderBackButton {...headerProps} />;
       }
       return <CommunityDrawerButton navigation={props.navigation} />;
     },
     [props.navigation],
   );
 
   const { width: screenWidth } = useWindowDimensions();
   const screenOptions = React.useMemo(
     () => ({
       ...defaultStackScreenOptions,
       header,
       headerLeft: headerLeftButton,
       headerStyle: {
         backgroundColor: colors.tabBarBackground,
         borderBottomWidth: 1,
       },
       gestureEnabled: true,
       gestureResponseDistance: screenWidth,
     }),
     [colors.tabBarBackground, headerLeftButton, screenWidth],
   );
 
   const chatThreadListOptions = React.useCallback(
     ({ navigation }) => ({
       headerTitle: 'Inbox',
       headerRight:
         Platform.OS === 'ios'
           ? () => <ComposeThreadButton navigate={navigation.navigate} />
           : undefined,
       headerBackTitleVisible: false,
       headerStyle: styles.threadListHeaderStyle,
     }),
     [styles.threadListHeaderStyle],
   );
 
   return (
     <View style={styles.view}>
       <KeyboardAvoidingView
         behavior="padding"
         style={styles.keyboardAvoidingView}
       >
         <Chat.Navigator screenOptions={screenOptions}>
           <Chat.Screen
             name={ChatThreadListRouteName}
             component={ChatThreadsComponent}
             options={chatThreadListOptions}
           />
           <Chat.Screen
             name={MessageListRouteName}
             component={MessageListContainer}
             options={messageListOptions}
           />
           <Chat.Screen
             name={ComposeSubchannelRouteName}
             component={ComposeSubchannel}
             options={composeThreadOptions}
           />
           <Chat.Screen
             name={ThreadSettingsRouteName}
             component={ThreadSettings}
             options={threadSettingsOptions}
           />
+          <Chat.Screen
+            name={FullScreenThreadMediaGalleryRouteName}
+            component={FullScreenThreadMediaGallery}
+            options={fullScreenThreadMediaGalleryOptions}
+          />
           <Chat.Screen
             name={DeleteThreadRouteName}
             component={DeleteThread}
             options={deleteThreadOptions}
           />
         </Chat.Navigator>
         <MessageStorePruner />
         <ThreadScreenPruner />
         {draftUpdater}
       </KeyboardAvoidingView>
     </View>
   );
 }
diff --git a/native/chat/fullscreen-thread-media-gallery.react.js b/native/chat/fullscreen-thread-media-gallery.react.js
new file mode 100644
index 000000000..6ff00b4d5
--- /dev/null
+++ b/native/chat/fullscreen-thread-media-gallery.react.js
@@ -0,0 +1,27 @@
+// @flow
+
+import * as React from 'react';
+import { Text } from 'react-native';
+
+import type { ThreadInfo } from 'lib/types/thread-types.js';
+
+import type { ChatNavigationProp } from './chat.react.js';
+import type { NavigationRoute } from '../navigation/route-names.js';
+
+export type FullScreenThreadMediaGalleryParams = {
+  +threadInfo: ThreadInfo,
+};
+
+type FullScreenThreadMediaGalleryProps = {
+  +navigation: ChatNavigationProp<'FullScreenThreadMediaGallery'>,
+  +route: NavigationRoute<'FullScreenThreadMediaGallery'>,
+};
+
+function FullScreenThreadMediaGallery(
+  props: FullScreenThreadMediaGalleryProps,
+): React.Node {
+  const { id } = props.route.params.threadInfo;
+  return <Text>{id}</Text>;
+}
+
+export default FullScreenThreadMediaGallery;
diff --git a/native/chat/settings/thread-settings-category.react.js b/native/chat/settings/thread-settings-category.react.js
index 188a5b9a7..997bf2350 100644
--- a/native/chat/settings/thread-settings-category.react.js
+++ b/native/chat/settings/thread-settings-category.react.js
@@ -1,98 +1,133 @@
 // @flow
 
 import invariant from 'invariant';
 import * as React from 'react';
-import { View, Text, Platform } from 'react-native';
+import { View, Text, Platform, TouchableOpacity } from 'react-native';
 
 import { useStyles } from '../../themes/colors.js';
 
 export type CategoryType = 'full' | 'outline' | 'unpadded';
 type HeaderProps = {
   +type: CategoryType,
   +title: string,
 };
 function ThreadSettingsCategoryHeader(props: HeaderProps): React.Node {
   const styles = useStyles(unboundStyles);
   let contentStyle, paddingStyle;
   if (props.type === 'full') {
     contentStyle = styles.fullHeader;
     paddingStyle = styles.fullHeaderPadding;
   } else if (props.type === 'outline') {
     // nothing
   } else if (props.type === 'unpadded') {
     contentStyle = styles.fullHeader;
   } else {
     invariant(false, 'invalid ThreadSettingsCategory type');
   }
   return (
     <View>
       <View style={[styles.header, contentStyle]}>
         <Text style={styles.title}>{props.title.toUpperCase()}</Text>
       </View>
       <View style={paddingStyle} />
     </View>
   );
 }
 
+type ActionHeaderProps = {
+  +title: string,
+  +actionText: string,
+  +onPress: () => mixed,
+};
+function ThreadSettingsCategoryActionHeader(
+  props: ActionHeaderProps,
+): React.Node {
+  const styles = useStyles(unboundStyles);
+  return (
+    <View style={styles.actionHeader}>
+      <Text style={styles.title}>{props.title.toUpperCase()}</Text>
+      <TouchableOpacity onPress={props.onPress}>
+        <Text style={styles.actionText}>{props.actionText}</Text>
+      </TouchableOpacity>
+    </View>
+  );
+}
+
 type FooterProps = {
   +type: CategoryType,
 };
 function ThreadSettingsCategoryFooter(props: FooterProps): React.Node {
   const styles = useStyles(unboundStyles);
   let contentStyle, paddingStyle;
   if (props.type === 'full') {
     contentStyle = styles.fullFooter;
     paddingStyle = styles.fullFooterPadding;
   } else if (props.type === 'outline') {
     // nothing
   } else if (props.type === 'unpadded') {
     contentStyle = styles.fullFooter;
   } else {
     invariant(false, 'invalid ThreadSettingsCategory type');
   }
   return (
     <View>
       <View style={paddingStyle} />
       <View style={[styles.footer, contentStyle]} />
     </View>
   );
 }
 
 const paddingHeight = Platform.select({
   android: 6.5,
   default: 6,
 });
 const unboundStyles = {
   footer: {
     marginBottom: 16,
   },
   fullFooter: {
     borderColor: 'panelForegroundBorder',
     borderTopWidth: 1,
   },
   fullFooterPadding: {
     backgroundColor: 'panelForeground',
     height: paddingHeight,
   },
   fullHeader: {
     borderBottomWidth: 1,
     borderColor: 'panelForegroundBorder',
   },
   fullHeaderPadding: {
     backgroundColor: 'panelForeground',
     height: paddingHeight,
     margin: 0,
   },
   header: {
     marginTop: 16,
   },
   title: {
     color: 'panelBackgroundLabel',
     fontSize: 12,
     fontWeight: '400',
     paddingBottom: 3,
     paddingLeft: 24,
   },
+  actionHeader: {
+    marginTop: 16,
+    flexDirection: 'row',
+    justifyContent: 'space-between',
+  },
+  actionText: {
+    color: 'link',
+    fontSize: 12,
+    fontWeight: '400',
+    paddingBottom: 3,
+    paddingRight: 12,
+  },
 };
 
-export { ThreadSettingsCategoryHeader, ThreadSettingsCategoryFooter };
+export {
+  ThreadSettingsCategoryHeader,
+  ThreadSettingsCategoryActionHeader,
+  ThreadSettingsCategoryFooter,
+};
diff --git a/native/chat/settings/thread-settings.react.js b/native/chat/settings/thread-settings.react.js
index 1e98c59bb..e45bd5c5b 100644
--- a/native/chat/settings/thread-settings.react.js
+++ b/native/chat/settings/thread-settings.react.js
@@ -1,1182 +1,1206 @@
 // @flow
 
 import invariant from 'invariant';
 import * as React from 'react';
 import { View, Platform } from 'react-native';
 import { FlatList } from 'react-native-gesture-handler';
 import { createSelector } from 'reselect';
 import tinycolor from 'tinycolor2';
 
 import {
   changeThreadSettingsActionTypes,
   leaveThreadActionTypes,
   removeUsersFromThreadActionTypes,
   changeThreadMemberRolesActionTypes,
 } from 'lib/actions/thread-actions.js';
 import { usePromoteSidebar } from 'lib/hooks/promote-sidebar.react.js';
 import { createLoadingStatusSelector } from 'lib/selectors/loading-selectors.js';
 import {
   threadInfoSelector,
   childThreadInfos,
 } from 'lib/selectors/thread-selectors.js';
 import { getAvailableRelationshipButtons } from 'lib/shared/relationship-utils.js';
 import {
   threadHasPermission,
   viewerIsMember,
   threadInChatList,
   getSingleOtherUser,
   threadIsChannel,
 } from 'lib/shared/thread-utils.js';
 import threadWatcher from 'lib/shared/thread-watcher.js';
 import type { RelationshipButton } from 'lib/types/relationship-types.js';
 import {
   type ThreadInfo,
   type ResolvedThreadInfo,
   type RelativeMemberInfo,
   threadPermissions,
   threadTypes,
 } from 'lib/types/thread-types.js';
 import type { UserInfos } from 'lib/types/user-types.js';
 import {
   useResolvedThreadInfo,
   useResolvedOptionalThreadInfo,
   useResolvedOptionalThreadInfos,
 } from 'lib/utils/entity-helpers.js';
 
 import type { CategoryType } from './thread-settings-category.react.js';
 import {
   ThreadSettingsCategoryHeader,
+  ThreadSettingsCategoryActionHeader,
   ThreadSettingsCategoryFooter,
 } from './thread-settings-category.react.js';
 import ThreadSettingsChildThread from './thread-settings-child-thread.react.js';
 import ThreadSettingsColor from './thread-settings-color.react.js';
 import ThreadSettingsDeleteThread from './thread-settings-delete-thread.react.js';
 import ThreadSettingsDescription from './thread-settings-description.react.js';
 import ThreadSettingsEditRelationship from './thread-settings-edit-relationship.react.js';
 import ThreadSettingsHomeNotifs from './thread-settings-home-notifs.react.js';
 import ThreadSettingsLeaveThread from './thread-settings-leave-thread.react.js';
 import {
   ThreadSettingsSeeMore,
   ThreadSettingsAddMember,
   ThreadSettingsAddSubchannel,
 } from './thread-settings-list-action.react.js';
 import ThreadSettingsMediaGallery from './thread-settings-media-gallery.react.js';
 import ThreadSettingsMember from './thread-settings-member.react.js';
 import ThreadSettingsName from './thread-settings-name.react.js';
 import ThreadSettingsParent from './thread-settings-parent.react.js';
 import ThreadSettingsPromoteSidebar from './thread-settings-promote-sidebar.react.js';
 import ThreadSettingsPushNotifs from './thread-settings-push-notifs.react.js';
 import ThreadSettingsVisibility from './thread-settings-visibility.react.js';
 import ThreadAncestors from '../../components/thread-ancestors.react.js';
 import {
   type KeyboardState,
   KeyboardContext,
 } from '../../keyboard/keyboard-state.js';
 import { defaultStackScreenOptions } from '../../navigation/options.js';
 import {
   OverlayContext,
   type OverlayContextType,
 } from '../../navigation/overlay-context.js';
 import {
   AddUsersModalRouteName,
   ComposeSubchannelModalRouteName,
+  FullScreenThreadMediaGalleryRouteName,
 } from '../../navigation/route-names.js';
 import type { NavigationRoute } from '../../navigation/route-names.js';
 import type { TabNavigationProp } from '../../navigation/tab-navigator.react.js';
 import { useSelector } from '../../redux/redux-utils.js';
 import type { AppState } from '../../redux/state-types.js';
 import {
   useStyles,
   type IndicatorStyle,
   useIndicatorStyle,
 } from '../../themes/colors.js';
 import type { VerticalBounds } from '../../types/layout-types.js';
 import type { ViewStyle } from '../../types/styles.js';
 import type { ChatNavigationProp } from '../chat.react.js';
 
 const itemPageLength = 5;
 
 export type ThreadSettingsParams = {
   +threadInfo: ThreadInfo,
 };
 
 export type ThreadSettingsNavigate = $PropertyType<
   ChatNavigationProp<'ThreadSettings'>,
   'navigate',
 >;
 
 type ChatSettingsItem =
   | {
       +itemType: 'header',
       +key: string,
       +title: string,
       +categoryType: CategoryType,
     }
+  | {
+      +itemType: 'actionHeader',
+      +key: string,
+      +title: string,
+      +actionText: string,
+      +onPress: () => void,
+    }
   | {
       +itemType: 'footer',
       +key: string,
       +categoryType: CategoryType,
     }
   | {
       +itemType: 'name',
       +key: string,
       +threadInfo: ResolvedThreadInfo,
       +nameEditValue: ?string,
       +canChangeSettings: boolean,
     }
   | {
       +itemType: 'color',
       +key: string,
       +threadInfo: ResolvedThreadInfo,
       +colorEditValue: string,
       +canChangeSettings: boolean,
       +navigate: ThreadSettingsNavigate,
       +threadSettingsRouteKey: string,
     }
   | {
       +itemType: 'description',
       +key: string,
       +threadInfo: ResolvedThreadInfo,
       +descriptionEditValue: ?string,
       +descriptionTextHeight: ?number,
       +canChangeSettings: boolean,
     }
   | {
       +itemType: 'parent',
       +key: string,
       +threadInfo: ResolvedThreadInfo,
       +parentThreadInfo: ?ResolvedThreadInfo,
     }
   | {
       +itemType: 'visibility',
       +key: string,
       +threadInfo: ResolvedThreadInfo,
     }
   | {
       +itemType: 'pushNotifs',
       +key: string,
       +threadInfo: ResolvedThreadInfo,
     }
   | {
       +itemType: 'homeNotifs',
       +key: string,
       +threadInfo: ResolvedThreadInfo,
     }
   | {
       +itemType: 'seeMore',
       +key: string,
       +onPress: () => void,
     }
   | {
       +itemType: 'childThread',
       +key: string,
       +threadInfo: ResolvedThreadInfo,
       +firstListItem: boolean,
       +lastListItem: boolean,
     }
   | {
       +itemType: 'addSubchannel',
       +key: string,
     }
   | {
       +itemType: 'member',
       +key: string,
       +memberInfo: RelativeMemberInfo,
       +threadInfo: ResolvedThreadInfo,
       +canEdit: boolean,
       +navigate: ThreadSettingsNavigate,
       +firstListItem: boolean,
       +lastListItem: boolean,
       +verticalBounds: ?VerticalBounds,
       +threadSettingsRouteKey: string,
     }
   | {
       +itemType: 'addMember',
       +key: string,
     }
   | {
       +itemType: 'mediaGallery',
       +key: string,
       +threadInfo: ThreadInfo,
       +limit: number,
     }
   | {
       +itemType: 'promoteSidebar' | 'leaveThread' | 'deleteThread',
       +key: string,
       +threadInfo: ResolvedThreadInfo,
       +navigate: ThreadSettingsNavigate,
       +buttonStyle: ViewStyle,
     }
   | {
       +itemType: 'editRelationship',
       +key: string,
       +threadInfo: ResolvedThreadInfo,
       +navigate: ThreadSettingsNavigate,
       +buttonStyle: ViewStyle,
       +relationshipButton: RelationshipButton,
     };
 
 type BaseProps = {
   +navigation: ChatNavigationProp<'ThreadSettings'>,
   +route: NavigationRoute<'ThreadSettings'>,
 };
 type Props = {
   ...BaseProps,
   // Redux state
   +userInfos: UserInfos,
   +viewerID: ?string,
   +threadInfo: ResolvedThreadInfo,
   +parentThreadInfo: ?ResolvedThreadInfo,
   +childThreadInfos: ?$ReadOnlyArray<ResolvedThreadInfo>,
   +somethingIsSaving: boolean,
   +styles: typeof unboundStyles,
   +indicatorStyle: IndicatorStyle,
   // withOverlayContext
   +overlayContext: ?OverlayContextType,
   // withKeyboardState
   +keyboardState: ?KeyboardState,
   +canPromoteSidebar: boolean,
 };
 type State = {
   +numMembersShowing: number,
   +numSubchannelsShowing: number,
   +numSidebarsShowing: number,
   +nameEditValue: ?string,
   +descriptionEditValue: ?string,
   +descriptionTextHeight: ?number,
   +colorEditValue: string,
   +verticalBounds: ?VerticalBounds,
 };
 type PropsAndState = { ...Props, ...State };
 class ThreadSettings extends React.PureComponent<Props, State> {
   flatListContainer: ?React.ElementRef<typeof View>;
 
   constructor(props: Props) {
     super(props);
     this.state = {
       numMembersShowing: itemPageLength,
       numSubchannelsShowing: itemPageLength,
       numSidebarsShowing: itemPageLength,
       nameEditValue: null,
       descriptionEditValue: null,
       descriptionTextHeight: null,
       colorEditValue: props.threadInfo.color,
       verticalBounds: null,
     };
   }
 
   static scrollDisabled(props: Props) {
     const { overlayContext } = props;
     invariant(overlayContext, 'ThreadSettings should have OverlayContext');
     return overlayContext.scrollBlockingModalStatus !== 'closed';
   }
 
   componentDidUpdate(prevProps: Props) {
     const prevThreadInfo = prevProps.threadInfo;
     const newThreadInfo = this.props.threadInfo;
 
     if (
       !tinycolor.equals(newThreadInfo.color, prevThreadInfo.color) &&
       tinycolor.equals(this.state.colorEditValue, prevThreadInfo.color)
     ) {
       this.setState({ colorEditValue: newThreadInfo.color });
     }
 
     if (defaultStackScreenOptions.gestureEnabled) {
       const scrollIsDisabled = ThreadSettings.scrollDisabled(this.props);
       const scrollWasDisabled = ThreadSettings.scrollDisabled(prevProps);
       if (!scrollWasDisabled && scrollIsDisabled) {
         this.props.navigation.setOptions({ gestureEnabled: false });
       } else if (scrollWasDisabled && !scrollIsDisabled) {
         this.props.navigation.setOptions({ gestureEnabled: true });
       }
     }
   }
 
   threadBasicsListDataSelector = createSelector(
     (propsAndState: PropsAndState) => propsAndState.threadInfo,
     (propsAndState: PropsAndState) => propsAndState.parentThreadInfo,
     (propsAndState: PropsAndState) => propsAndState.nameEditValue,
     (propsAndState: PropsAndState) => propsAndState.colorEditValue,
     (propsAndState: PropsAndState) => propsAndState.descriptionEditValue,
     (propsAndState: PropsAndState) => propsAndState.descriptionTextHeight,
     (propsAndState: PropsAndState) => !propsAndState.somethingIsSaving,
     (propsAndState: PropsAndState) => propsAndState.navigation.navigate,
     (propsAndState: PropsAndState) => propsAndState.route.key,
     (
       threadInfo: ResolvedThreadInfo,
       parentThreadInfo: ?ResolvedThreadInfo,
       nameEditValue: ?string,
       colorEditValue: string,
       descriptionEditValue: ?string,
       descriptionTextHeight: ?number,
       canStartEditing: boolean,
       navigate: ThreadSettingsNavigate,
       routeKey: string,
     ) => {
       const canEditThreadName = threadHasPermission(
         threadInfo,
         threadPermissions.EDIT_THREAD_NAME,
       );
       const canEditThreadDescription = threadHasPermission(
         threadInfo,
         threadPermissions.EDIT_THREAD_DESCRIPTION,
       );
       const canEditThreadColor = threadHasPermission(
         threadInfo,
         threadPermissions.EDIT_THREAD_COLOR,
       );
       const canChangeName = canEditThreadName && canStartEditing;
       const canChangeDescription = canEditThreadDescription && canStartEditing;
       const canChangeColor = canEditThreadColor && canStartEditing;
 
       const listData: ChatSettingsItem[] = [];
       listData.push({
         itemType: 'header',
         key: 'basicsHeader',
         title: 'Basics',
         categoryType: 'full',
       });
       listData.push({
         itemType: 'name',
         key: 'name',
         threadInfo,
         nameEditValue,
         canChangeSettings: canChangeName,
       });
       listData.push({
         itemType: 'color',
         key: 'color',
         threadInfo,
         colorEditValue,
         canChangeSettings: canChangeColor,
         navigate,
         threadSettingsRouteKey: routeKey,
       });
       listData.push({
         itemType: 'footer',
         key: 'basicsFooter',
         categoryType: 'full',
       });
 
       if (
         (descriptionEditValue !== null && descriptionEditValue !== undefined) ||
         threadInfo.description ||
         canEditThreadDescription
       ) {
         listData.push({
           itemType: 'description',
           key: 'description',
           threadInfo,
           descriptionEditValue,
           descriptionTextHeight,
           canChangeSettings: canChangeDescription,
         });
       }
 
       const isMember = viewerIsMember(threadInfo);
       if (isMember) {
         listData.push({
           itemType: 'header',
           key: 'subscriptionHeader',
           title: 'Subscription',
           categoryType: 'full',
         });
         listData.push({
           itemType: 'pushNotifs',
           key: 'pushNotifs',
           threadInfo,
         });
         if (threadInfo.type !== threadTypes.SIDEBAR) {
           listData.push({
             itemType: 'homeNotifs',
             key: 'homeNotifs',
             threadInfo,
           });
         }
         listData.push({
           itemType: 'footer',
           key: 'subscriptionFooter',
           categoryType: 'full',
         });
       }
 
       listData.push({
         itemType: 'header',
         key: 'privacyHeader',
         title: 'Privacy',
         categoryType: 'full',
       });
       listData.push({
         itemType: 'visibility',
         key: 'visibility',
         threadInfo,
       });
       listData.push({
         itemType: 'parent',
         key: 'parent',
         threadInfo,
         parentThreadInfo,
       });
       listData.push({
         itemType: 'footer',
         key: 'privacyFooter',
         categoryType: 'full',
       });
       return listData;
     },
   );
 
   subchannelsListDataSelector = createSelector(
     (propsAndState: PropsAndState) => propsAndState.threadInfo,
     (propsAndState: PropsAndState) => propsAndState.navigation.navigate,
     (propsAndState: PropsAndState) => propsAndState.childThreadInfos,
     (propsAndState: PropsAndState) => propsAndState.numSubchannelsShowing,
     (
       threadInfo: ResolvedThreadInfo,
       navigate: ThreadSettingsNavigate,
       childThreads: ?$ReadOnlyArray<ResolvedThreadInfo>,
       numSubchannelsShowing: number,
     ) => {
       const listData: ChatSettingsItem[] = [];
 
       const subchannels = childThreads?.filter(threadIsChannel) ?? [];
       const canCreateSubchannels = threadHasPermission(
         threadInfo,
         threadPermissions.CREATE_SUBCHANNELS,
       );
       if (subchannels.length === 0 && !canCreateSubchannels) {
         return listData;
       }
 
       listData.push({
         itemType: 'header',
         key: 'subchannelHeader',
         title: 'Subchannels',
         categoryType: 'unpadded',
       });
 
       if (canCreateSubchannels) {
         listData.push({
           itemType: 'addSubchannel',
           key: 'addSubchannel',
         });
       }
 
       const numItems = Math.min(numSubchannelsShowing, subchannels.length);
       for (let i = 0; i < numItems; i++) {
         const subchannelInfo = subchannels[i];
         listData.push({
           itemType: 'childThread',
           key: `childThread${subchannelInfo.id}`,
           threadInfo: subchannelInfo,
           firstListItem: i === 0 && !canCreateSubchannels,
           lastListItem: i === numItems - 1 && numItems === subchannels.length,
         });
       }
 
       if (numItems < subchannels.length) {
         listData.push({
           itemType: 'seeMore',
           key: 'seeMoreSubchannels',
           onPress: this.onPressSeeMoreSubchannels,
         });
       }
 
       listData.push({
         itemType: 'footer',
         key: 'subchannelFooter',
         categoryType: 'unpadded',
       });
 
       return listData;
     },
   );
 
   sidebarsListDataSelector = createSelector(
     (propsAndState: PropsAndState) => propsAndState.navigation.navigate,
     (propsAndState: PropsAndState) => propsAndState.childThreadInfos,
     (propsAndState: PropsAndState) => propsAndState.numSidebarsShowing,
     (
       navigate: ThreadSettingsNavigate,
       childThreads: ?$ReadOnlyArray<ResolvedThreadInfo>,
       numSidebarsShowing: number,
     ) => {
       const listData: ChatSettingsItem[] = [];
 
       const sidebars =
         childThreads?.filter(
           childThreadInfo => childThreadInfo.type === threadTypes.SIDEBAR,
         ) ?? [];
       if (sidebars.length === 0) {
         return listData;
       }
 
       listData.push({
         itemType: 'header',
         key: 'sidebarHeader',
         title: 'Threads',
         categoryType: 'unpadded',
       });
 
       const numItems = Math.min(numSidebarsShowing, sidebars.length);
       for (let i = 0; i < numItems; i++) {
         const sidebarInfo = sidebars[i];
         listData.push({
           itemType: 'childThread',
           key: `childThread${sidebarInfo.id}`,
           threadInfo: sidebarInfo,
           firstListItem: i === 0,
           lastListItem: i === numItems - 1 && numItems === sidebars.length,
         });
       }
 
       if (numItems < sidebars.length) {
         listData.push({
           itemType: 'seeMore',
           key: 'seeMoreSidebars',
           onPress: this.onPressSeeMoreSidebars,
         });
       }
 
       listData.push({
         itemType: 'footer',
         key: 'sidebarFooter',
         categoryType: 'unpadded',
       });
 
       return listData;
     },
   );
 
   threadMembersListDataSelector = createSelector(
     (propsAndState: PropsAndState) => propsAndState.threadInfo,
     (propsAndState: PropsAndState) => !propsAndState.somethingIsSaving,
     (propsAndState: PropsAndState) => propsAndState.navigation.navigate,
     (propsAndState: PropsAndState) => propsAndState.route.key,
     (propsAndState: PropsAndState) => propsAndState.numMembersShowing,
     (propsAndState: PropsAndState) => propsAndState.verticalBounds,
     (
       threadInfo: ResolvedThreadInfo,
       canStartEditing: boolean,
       navigate: ThreadSettingsNavigate,
       routeKey: string,
       numMembersShowing: number,
       verticalBounds: ?VerticalBounds,
     ) => {
       const listData: ChatSettingsItem[] = [];
 
       const canAddMembers = threadHasPermission(
         threadInfo,
         threadPermissions.ADD_MEMBERS,
       );
       if (threadInfo.members.length === 0 && !canAddMembers) {
         return listData;
       }
 
       listData.push({
         itemType: 'header',
         key: 'memberHeader',
         title: 'Members',
         categoryType: 'unpadded',
       });
 
       if (canAddMembers) {
         listData.push({
           itemType: 'addMember',
           key: 'addMember',
         });
       }
 
       const numItems = Math.min(numMembersShowing, threadInfo.members.length);
       for (let i = 0; i < numItems; i++) {
         const memberInfo = threadInfo.members[i];
         listData.push({
           itemType: 'member',
           key: `member${memberInfo.id}`,
           memberInfo,
           threadInfo,
           canEdit: canStartEditing,
           navigate,
           firstListItem: i === 0 && !canAddMembers,
           lastListItem:
             i === numItems - 1 && numItems === threadInfo.members.length,
           verticalBounds,
           threadSettingsRouteKey: routeKey,
         });
       }
 
       if (numItems < threadInfo.members.length) {
         listData.push({
           itemType: 'seeMore',
           key: 'seeMoreMembers',
           onPress: this.onPressSeeMoreMembers,
         });
       }
 
       listData.push({
         itemType: 'footer',
         key: 'memberFooter',
         categoryType: 'unpadded',
       });
 
       return listData;
     },
   );
 
   mediaGalleryListDataSelector = createSelector(
     (propsAndState: PropsAndState) => propsAndState.threadInfo,
     (threadInfo: ThreadInfo) => {
       const listData: ChatSettingsItem[] = [];
       const limit = 6;
 
       listData.push({
-        itemType: 'header',
+        itemType: 'actionHeader',
         key: 'mediaGalleryHeader',
         title: 'Media Gallery',
-        categoryType: 'outline',
+        actionText: 'See more',
+        onPress: this.onPressSeeMoreMediaGallery,
       });
 
       listData.push({
         itemType: 'mediaGallery',
         key: 'mediaGallery',
         threadInfo,
         limit,
       });
 
       listData.push({
         itemType: 'footer',
         key: 'mediaGalleryFooter',
         categoryType: 'outline',
       });
 
       return listData;
     },
   );
 
   actionsListDataSelector = createSelector(
     (propsAndState: PropsAndState) => propsAndState.threadInfo,
     (propsAndState: PropsAndState) => propsAndState.parentThreadInfo,
     (propsAndState: PropsAndState) => propsAndState.navigation.navigate,
     (propsAndState: PropsAndState) => propsAndState.styles,
     (propsAndState: PropsAndState) => propsAndState.userInfos,
     (propsAndState: PropsAndState) => propsAndState.viewerID,
     (
       threadInfo: ResolvedThreadInfo,
       parentThreadInfo: ?ResolvedThreadInfo,
       navigate: ThreadSettingsNavigate,
       styles: typeof unboundStyles,
       userInfos: UserInfos,
       viewerID: ?string,
     ) => {
       const buttons = [];
 
       if (this.props.canPromoteSidebar) {
         buttons.push({
           itemType: 'promoteSidebar',
           key: 'promoteSidebar',
           threadInfo,
           navigate,
         });
       }
 
       const canLeaveThread = threadHasPermission(
         threadInfo,
         threadPermissions.LEAVE_THREAD,
       );
 
       if (viewerIsMember(threadInfo) && canLeaveThread) {
         buttons.push({
           itemType: 'leaveThread',
           key: 'leaveThread',
           threadInfo,
           navigate,
         });
       }
 
       const canDeleteThread = threadHasPermission(
         threadInfo,
         threadPermissions.DELETE_THREAD,
       );
       if (canDeleteThread) {
         buttons.push({
           itemType: 'deleteThread',
           key: 'deleteThread',
           threadInfo,
           navigate,
         });
       }
 
       const threadIsPersonal = threadInfo.type === threadTypes.PERSONAL;
       if (threadIsPersonal && viewerID) {
         const otherMemberID = getSingleOtherUser(threadInfo, viewerID);
         if (otherMemberID) {
           const otherUserInfo = userInfos[otherMemberID];
           const availableRelationshipActions =
             getAvailableRelationshipButtons(otherUserInfo);
 
           for (const action of availableRelationshipActions) {
             buttons.push({
               itemType: 'editRelationship',
               key: action,
               threadInfo,
               navigate,
               relationshipButton: action,
             });
           }
         }
       }
 
       const listData: ChatSettingsItem[] = [];
       if (buttons.length === 0) {
         return listData;
       }
 
       listData.push({
         itemType: 'header',
         key: 'actionsHeader',
         title: 'Actions',
         categoryType: 'unpadded',
       });
       for (let i = 0; i < buttons.length; i++) {
         // Necessary for Flow...
         if (buttons[i].itemType === 'editRelationship') {
           listData.push({
             ...buttons[i],
             buttonStyle: [
               i === 0 ? null : styles.nonTopButton,
               i === buttons.length - 1 ? styles.lastButton : null,
             ],
           });
         } else {
           listData.push({
             ...buttons[i],
             buttonStyle: [
               i === 0 ? null : styles.nonTopButton,
               i === buttons.length - 1 ? styles.lastButton : null,
             ],
           });
         }
       }
       listData.push({
         itemType: 'footer',
         key: 'actionsFooter',
         categoryType: 'unpadded',
       });
 
       return listData;
     },
   );
 
   listDataSelector = createSelector(
     this.threadBasicsListDataSelector,
     this.subchannelsListDataSelector,
     this.sidebarsListDataSelector,
     this.threadMembersListDataSelector,
     this.mediaGalleryListDataSelector,
     this.actionsListDataSelector,
     (
       threadBasicsListData: ChatSettingsItem[],
       subchannelsListData: ChatSettingsItem[],
       sidebarsListData: ChatSettingsItem[],
       threadMembersListData: ChatSettingsItem[],
       mediaGalleryListData: ChatSettingsItem[],
       actionsListData: ChatSettingsItem[],
     ) => [
       ...threadBasicsListData,
       ...subchannelsListData,
       ...sidebarsListData,
       ...threadMembersListData,
       ...mediaGalleryListData,
       ...actionsListData,
     ],
   );
 
   get listData() {
     return this.listDataSelector({ ...this.props, ...this.state });
   }
 
   render() {
     return (
       <View
         style={this.props.styles.container}
         ref={this.flatListContainerRef}
         onLayout={this.onFlatListContainerLayout}
       >
         <ThreadAncestors threadInfo={this.props.threadInfo} />
         <FlatList
           data={this.listData}
           contentContainerStyle={this.props.styles.flatList}
           renderItem={this.renderItem}
           scrollEnabled={!ThreadSettings.scrollDisabled(this.props)}
           indicatorStyle={this.props.indicatorStyle}
           initialNumToRender={20}
         />
       </View>
     );
   }
 
   flatListContainerRef = (
     flatListContainer: ?React.ElementRef<typeof View>,
   ) => {
     this.flatListContainer = flatListContainer;
   };
 
   onFlatListContainerLayout = () => {
     const { flatListContainer } = this;
     if (!flatListContainer) {
       return;
     }
 
     const { keyboardState } = this.props;
     if (!keyboardState || keyboardState.keyboardShowing) {
       return;
     }
 
     flatListContainer.measure((x, y, width, height, pageX, pageY) => {
       if (
         height === null ||
         height === undefined ||
         pageY === null ||
         pageY === undefined
       ) {
         return;
       }
       this.setState({ verticalBounds: { height, y: pageY } });
     });
   };
 
   renderItem = (row: { item: ChatSettingsItem, ... }) => {
     const item = row.item;
     if (item.itemType === 'header') {
       return (
         <ThreadSettingsCategoryHeader
           type={item.categoryType}
           title={item.title}
         />
       );
+    } else if (item.itemType === 'actionHeader') {
+      return (
+        <ThreadSettingsCategoryActionHeader
+          title={item.title}
+          actionText={item.actionText}
+          onPress={item.onPress}
+        />
+      );
     } else if (item.itemType === 'footer') {
       return <ThreadSettingsCategoryFooter type={item.categoryType} />;
     } else if (item.itemType === 'name') {
       return (
         <ThreadSettingsName
           threadInfo={item.threadInfo}
           nameEditValue={item.nameEditValue}
           setNameEditValue={this.setNameEditValue}
           canChangeSettings={item.canChangeSettings}
         />
       );
     } else if (item.itemType === 'color') {
       return (
         <ThreadSettingsColor
           threadInfo={item.threadInfo}
           colorEditValue={item.colorEditValue}
           setColorEditValue={this.setColorEditValue}
           canChangeSettings={item.canChangeSettings}
           navigate={item.navigate}
           threadSettingsRouteKey={item.threadSettingsRouteKey}
         />
       );
     } else if (item.itemType === 'description') {
       return (
         <ThreadSettingsDescription
           threadInfo={item.threadInfo}
           descriptionEditValue={item.descriptionEditValue}
           setDescriptionEditValue={this.setDescriptionEditValue}
           descriptionTextHeight={item.descriptionTextHeight}
           setDescriptionTextHeight={this.setDescriptionTextHeight}
           canChangeSettings={item.canChangeSettings}
         />
       );
     } else if (item.itemType === 'parent') {
       return (
         <ThreadSettingsParent
           threadInfo={item.threadInfo}
           parentThreadInfo={item.parentThreadInfo}
         />
       );
     } else if (item.itemType === 'visibility') {
       return <ThreadSettingsVisibility threadInfo={item.threadInfo} />;
     } else if (item.itemType === 'pushNotifs') {
       return <ThreadSettingsPushNotifs threadInfo={item.threadInfo} />;
     } else if (item.itemType === 'homeNotifs') {
       return <ThreadSettingsHomeNotifs threadInfo={item.threadInfo} />;
     } else if (item.itemType === 'seeMore') {
       return <ThreadSettingsSeeMore onPress={item.onPress} />;
     } else if (item.itemType === 'childThread') {
       return (
         <ThreadSettingsChildThread
           threadInfo={item.threadInfo}
           firstListItem={item.firstListItem}
           lastListItem={item.lastListItem}
         />
       );
     } else if (item.itemType === 'addSubchannel') {
       return (
         <ThreadSettingsAddSubchannel onPress={this.onPressComposeSubchannel} />
       );
     } else if (item.itemType === 'member') {
       return (
         <ThreadSettingsMember
           memberInfo={item.memberInfo}
           threadInfo={item.threadInfo}
           canEdit={item.canEdit}
           navigate={item.navigate}
           firstListItem={item.firstListItem}
           lastListItem={item.lastListItem}
           verticalBounds={item.verticalBounds}
           threadSettingsRouteKey={item.threadSettingsRouteKey}
         />
       );
     } else if (item.itemType === 'addMember') {
       return <ThreadSettingsAddMember onPress={this.onPressAddMember} />;
     } else if (item.itemType === 'mediaGallery') {
       return (
         <ThreadSettingsMediaGallery
           threadID={item.threadInfo.id}
           limit={item.limit}
         />
       );
     } else if (item.itemType === 'leaveThread') {
       return (
         <ThreadSettingsLeaveThread
           threadInfo={item.threadInfo}
           buttonStyle={item.buttonStyle}
         />
       );
     } else if (item.itemType === 'deleteThread') {
       return (
         <ThreadSettingsDeleteThread
           threadInfo={item.threadInfo}
           navigate={item.navigate}
           buttonStyle={item.buttonStyle}
         />
       );
     } else if (item.itemType === 'promoteSidebar') {
       return (
         <ThreadSettingsPromoteSidebar
           threadInfo={item.threadInfo}
           buttonStyle={item.buttonStyle}
         />
       );
     } else if (item.itemType === 'editRelationship') {
       return (
         <ThreadSettingsEditRelationship
           threadInfo={item.threadInfo}
           relationshipButton={item.relationshipButton}
           buttonStyle={item.buttonStyle}
         />
       );
     } else {
       invariant(false, `unexpected ThreadSettings item type ${item.itemType}`);
     }
   };
 
   setNameEditValue = (value: ?string, callback?: () => void) => {
     this.setState({ nameEditValue: value }, callback);
   };
 
   setColorEditValue = (color: string) => {
     this.setState({ colorEditValue: color });
   };
 
   setDescriptionEditValue = (value: ?string, callback?: () => void) => {
     this.setState({ descriptionEditValue: value }, callback);
   };
 
   setDescriptionTextHeight = (height: number) => {
     this.setState({ descriptionTextHeight: height });
   };
 
   onPressComposeSubchannel = () => {
     this.props.navigation.navigate(ComposeSubchannelModalRouteName, {
       presentedFrom: this.props.route.key,
       threadInfo: this.props.threadInfo,
     });
   };
 
   onPressAddMember = () => {
     this.props.navigation.navigate(AddUsersModalRouteName, {
       presentedFrom: this.props.route.key,
       threadInfo: this.props.threadInfo,
     });
   };
 
   onPressSeeMoreMembers = () => {
     this.setState(prevState => ({
       numMembersShowing: prevState.numMembersShowing + itemPageLength,
     }));
   };
 
   onPressSeeMoreSubchannels = () => {
     this.setState(prevState => ({
       numSubchannelsShowing: prevState.numSubchannelsShowing + itemPageLength,
     }));
   };
 
   onPressSeeMoreSidebars = () => {
     this.setState(prevState => ({
       numSidebarsShowing: prevState.numSidebarsShowing + itemPageLength,
     }));
   };
+
+  onPressSeeMoreMediaGallery = () => {
+    this.props.navigation.navigate(FullScreenThreadMediaGalleryRouteName, {
+      threadInfo: this.props.threadInfo,
+    });
+  };
 }
 
 const unboundStyles = {
   container: {
     backgroundColor: 'panelBackground',
     flex: 1,
   },
   flatList: {
     paddingVertical: 16,
   },
   nonTopButton: {
     borderColor: 'panelForegroundBorder',
     borderTopWidth: 1,
   },
   lastButton: {
     paddingBottom: Platform.OS === 'ios' ? 14 : 12,
   },
 };
 
 const editNameLoadingStatusSelector = createLoadingStatusSelector(
   changeThreadSettingsActionTypes,
   `${changeThreadSettingsActionTypes.started}:name`,
 );
 const editColorLoadingStatusSelector = createLoadingStatusSelector(
   changeThreadSettingsActionTypes,
   `${changeThreadSettingsActionTypes.started}:color`,
 );
 const editDescriptionLoadingStatusSelector = createLoadingStatusSelector(
   changeThreadSettingsActionTypes,
   `${changeThreadSettingsActionTypes.started}:description`,
 );
 const leaveThreadLoadingStatusSelector = createLoadingStatusSelector(
   leaveThreadActionTypes,
 );
 
 const somethingIsSaving = (
   state: AppState,
   threadMembers: $ReadOnlyArray<RelativeMemberInfo>,
 ) => {
   if (
     editNameLoadingStatusSelector(state) === 'loading' ||
     editColorLoadingStatusSelector(state) === 'loading' ||
     editDescriptionLoadingStatusSelector(state) === 'loading' ||
     leaveThreadLoadingStatusSelector(state) === 'loading'
   ) {
     return true;
   }
   for (const threadMember of threadMembers) {
     const removeUserLoadingStatus = createLoadingStatusSelector(
       removeUsersFromThreadActionTypes,
       `${removeUsersFromThreadActionTypes.started}:${threadMember.id}`,
     )(state);
     if (removeUserLoadingStatus === 'loading') {
       return true;
     }
     const changeRoleLoadingStatus = createLoadingStatusSelector(
       changeThreadMemberRolesActionTypes,
       `${changeThreadMemberRolesActionTypes.started}:${threadMember.id}`,
     )(state);
     if (changeRoleLoadingStatus === 'loading') {
       return true;
     }
   }
   return false;
 };
 
 const ConnectedThreadSettings: React.ComponentType<BaseProps> =
   React.memo<BaseProps>(function ConnectedThreadSettings(props: BaseProps) {
     const userInfos = useSelector(state => state.userStore.userInfos);
     const viewerID = useSelector(
       state => state.currentUserInfo && state.currentUserInfo.id,
     );
     const threadID = props.route.params.threadInfo.id;
 
     const reduxThreadInfo: ?ThreadInfo = useSelector(
       state => threadInfoSelector(state)[threadID],
     );
     React.useEffect(() => {
       invariant(
         reduxThreadInfo,
         'ReduxThreadInfo should exist when ThreadSettings is opened',
       );
       // eslint-disable-next-line react-hooks/exhaustive-deps
     }, []);
 
     const { setParams } = props.navigation;
     React.useEffect(() => {
       if (reduxThreadInfo) {
         setParams({ threadInfo: reduxThreadInfo });
       }
     }, [reduxThreadInfo, setParams]);
     const threadInfo: ThreadInfo =
       reduxThreadInfo ?? props.route.params.threadInfo;
     const resolvedThreadInfo = useResolvedThreadInfo(threadInfo);
 
     React.useEffect(() => {
       if (threadInChatList(threadInfo)) {
         return undefined;
       }
       threadWatcher.watchID(threadInfo.id);
       return () => {
         threadWatcher.removeID(threadInfo.id);
       };
     }, [threadInfo]);
 
     const parentThreadID = threadInfo.parentThreadID;
     const parentThreadInfo: ?ThreadInfo = useSelector(state =>
       parentThreadID ? threadInfoSelector(state)[parentThreadID] : null,
     );
     const resolvedParentThreadInfo =
       useResolvedOptionalThreadInfo(parentThreadInfo);
     const threadMembers = threadInfo.members;
     const boundChildThreadInfos = useSelector(
       state => childThreadInfos(state)[threadID],
     );
     const resolvedChildThreadInfos = useResolvedOptionalThreadInfos(
       boundChildThreadInfos,
     );
     const boundSomethingIsSaving = useSelector(state =>
       somethingIsSaving(state, threadMembers),
     );
 
     const { navigation } = props;
     React.useEffect(() => {
       const tabNavigation: ?TabNavigationProp<'Chat'> = navigation.getParent();
       invariant(tabNavigation, 'ChatNavigator should be within TabNavigator');
 
       const onTabPress = () => {
         if (navigation.isFocused() && !boundSomethingIsSaving) {
           navigation.popToTop();
         }
       };
 
       tabNavigation.addListener('tabPress', onTabPress);
       return () => tabNavigation.removeListener('tabPress', onTabPress);
     }, [navigation, boundSomethingIsSaving]);
 
     const styles = useStyles(unboundStyles);
     const indicatorStyle = useIndicatorStyle();
     const overlayContext = React.useContext(OverlayContext);
     const keyboardState = React.useContext(KeyboardContext);
     const { canPromoteSidebar } = usePromoteSidebar(threadInfo);
     return (
       <ThreadSettings
         {...props}
         userInfos={userInfos}
         viewerID={viewerID}
         threadInfo={resolvedThreadInfo}
         parentThreadInfo={resolvedParentThreadInfo}
         childThreadInfos={resolvedChildThreadInfos}
         somethingIsSaving={boundSomethingIsSaving}
         styles={styles}
         indicatorStyle={indicatorStyle}
         overlayContext={overlayContext}
         keyboardState={keyboardState}
         canPromoteSidebar={canPromoteSidebar}
       />
     );
   });
 
 export default ConnectedThreadSettings;
diff --git a/native/navigation/route-names.js b/native/navigation/route-names.js
index fc198d50f..f5d3d8e9e 100644
--- a/native/navigation/route-names.js
+++ b/native/navigation/route-names.js
@@ -1,186 +1,191 @@
 // @flow
 
 import type { RouteProp } from '@react-navigation/native';
 
 import type { ActionResultModalParams } from './action-result-modal.react.js';
 import type { TermsAndPrivacyModalParams } from '../account/terms-and-privacy-modal.react.js';
 import type { ThreadPickerModalParams } from '../calendar/thread-picker-modal.react.js';
 import type { ComposeSubchannelParams } from '../chat/compose-subchannel.react.js';
+import type { FullScreenThreadMediaGalleryParams } from '../chat/fullscreen-thread-media-gallery.react.js';
 import type { ImagePasteModalParams } from '../chat/image-paste-modal.react.js';
 import type { MessageListParams } from '../chat/message-list-types.js';
 import type { MessageReactionsModalParams } from '../chat/message-reactions-modal.react.js';
 import type { MultimediaMessageTooltipModalParams } from '../chat/multimedia-message-tooltip-modal.react.js';
 import type { RobotextMessageTooltipModalParams } from '../chat/robotext-message-tooltip-modal.react.js';
 import type { AddUsersModalParams } from '../chat/settings/add-users-modal.react.js';
 import type { ColorSelectorModalParams } from '../chat/settings/color-selector-modal.react.js';
 import type { ComposeSubchannelModalParams } from '../chat/settings/compose-subchannel-modal.react.js';
 import type { DeleteThreadParams } from '../chat/settings/delete-thread.react.js';
 import type { ThreadSettingsMemberTooltipModalParams } from '../chat/settings/thread-settings-member-tooltip-modal.react.js';
 import type { ThreadSettingsParams } from '../chat/settings/thread-settings.react.js';
 import type { SidebarListModalParams } from '../chat/sidebar-list-modal.react.js';
 import type { SubchannelListModalParams } from '../chat/subchannels-list-modal.react.js';
 import type { TextMessageTooltipModalParams } from '../chat/text-message-tooltip-modal.react.js';
 import type { CameraModalParams } from '../media/camera-modal.react.js';
 import type { ImageModalParams } from '../media/image-modal.react.js';
 import type { VideoPlaybackModalParams } from '../media/video-playback-modal.react.js';
 import type { CustomServerModalParams } from '../profile/custom-server-modal.react.js';
 import type { RelationshipListItemTooltipModalParams } from '../profile/relationship-list-item-tooltip-modal.react.js';
 
 export const ActionResultModalRouteName = 'ActionResultModal';
 export const AddUsersModalRouteName = 'AddUsersModal';
 export const AppearancePreferencesRouteName = 'AppearancePreferences';
 export const AppRouteName = 'App';
 export const AppsRouteName = 'Apps';
 export const BackgroundChatThreadListRouteName = 'BackgroundChatThreadList';
 export const BlockListRouteName = 'BlockList';
 export const BuildInfoRouteName = 'BuildInfo';
 export const CalendarRouteName = 'Calendar';
 export const CameraModalRouteName = 'CameraModal';
 export const ChatRouteName = 'Chat';
 export const ChatThreadListRouteName = 'ChatThreadList';
 export const ColorSelectorModalRouteName = 'ColorSelectorModal';
 export const ComposeSubchannelModalRouteName = 'ComposeSubchannelModal';
 export const ComposeSubchannelRouteName = 'ComposeSubchannel';
 export const CommunityDrawerNavigatorRouteName = 'CommunityDrawerNavigator';
 export const CustomServerModalRouteName = 'CustomServerModal';
 export const DefaultNotificationsPreferencesRouteName = 'DefaultNotifications';
 export const DeleteAccountRouteName = 'DeleteAccount';
 export const DeleteThreadRouteName = 'DeleteThread';
 export const DevToolsRouteName = 'DevTools';
 export const EditPasswordRouteName = 'EditPassword';
 export const FriendListRouteName = 'FriendList';
+export const FullScreenThreadMediaGalleryRouteName =
+  'FullScreenThreadMediaGallery';
 export const HomeChatThreadListRouteName = 'HomeChatThreadList';
 export const ImageModalRouteName = 'ImageModal';
 export const ImagePasteModalRouteName = 'ImagePasteModal';
 export const LoggedOutModalRouteName = 'LoggedOutModal';
 export const MessageListRouteName = 'MessageList';
 export const MessageReactionsModalRouteName = 'MessageReactionsModal';
 export const MultimediaMessageTooltipModalRouteName =
   'MultimediaMessageTooltipModal';
 export const PrivacyPreferencesRouteName = 'PrivacyPreferences';
 export const ProfileRouteName = 'Profile';
 export const ProfileScreenRouteName = 'ProfileScreen';
 export const RelationshipListItemTooltipModalRouteName =
   'RelationshipListItemTooltipModal';
 export const RobotextMessageTooltipModalRouteName =
   'RobotextMessageTooltipModal';
 export const SidebarListModalRouteName = 'SidebarListModal';
 export const SubchannelsListModalRouteName = 'SubchannelsListModal';
 export const TabNavigatorRouteName = 'TabNavigator';
 export const TextMessageTooltipModalRouteName = 'TextMessageTooltipModal';
 export const ThreadPickerModalRouteName = 'ThreadPickerModal';
 export const ThreadSettingsMemberTooltipModalRouteName =
   'ThreadSettingsMemberTooltipModal';
 export const ThreadSettingsRouteName = 'ThreadSettings';
 export const VideoPlaybackModalRouteName = 'VideoPlaybackModal';
 export const TermsAndPrivacyRouteName = 'TermsAndPrivacyModal';
 
 export type RootParamList = {
   +LoggedOutModal: void,
   +App: void,
   +ThreadPickerModal: ThreadPickerModalParams,
   +AddUsersModal: AddUsersModalParams,
   +CustomServerModal: CustomServerModalParams,
   +ColorSelectorModal: ColorSelectorModalParams,
   +ComposeSubchannelModal: ComposeSubchannelModalParams,
   +SidebarListModal: SidebarListModalParams,
   +ImagePasteModal: ImagePasteModalParams,
   +TermsAndPrivacyModal: TermsAndPrivacyModalParams,
   +SubchannelsListModal: SubchannelListModalParams,
   +MessageReactionsModal: MessageReactionsModalParams,
 };
 
 export type MessageTooltipRouteNames =
   | typeof RobotextMessageTooltipModalRouteName
   | typeof MultimediaMessageTooltipModalRouteName
   | typeof TextMessageTooltipModalRouteName;
 
 export type TooltipModalParamList = {
   +MultimediaMessageTooltipModal: MultimediaMessageTooltipModalParams,
   +TextMessageTooltipModal: TextMessageTooltipModalParams,
   +ThreadSettingsMemberTooltipModal: ThreadSettingsMemberTooltipModalParams,
   +RelationshipListItemTooltipModal: RelationshipListItemTooltipModalParams,
   +RobotextMessageTooltipModal: RobotextMessageTooltipModalParams,
 };
 
 export type OverlayParamList = {
   +CommunityDrawerNavigator: void,
   +ImageModal: ImageModalParams,
   +ActionResultModal: ActionResultModalParams,
   +CameraModal: CameraModalParams,
   +VideoPlaybackModal: VideoPlaybackModalParams,
   ...TooltipModalParamList,
 };
 
 export type TabParamList = {
   +Calendar: void,
   +Chat: void,
   +Profile: void,
   +Apps: void,
 };
 
 export type ChatParamList = {
   +ChatThreadList: void,
   +MessageList: MessageListParams,
   +ComposeSubchannel: ComposeSubchannelParams,
   +ThreadSettings: ThreadSettingsParams,
   +DeleteThread: DeleteThreadParams,
+  +FullScreenThreadMediaGallery: FullScreenThreadMediaGalleryParams,
 };
 
 export type ChatTopTabsParamList = {
   +HomeChatThreadList: void,
   +BackgroundChatThreadList: void,
 };
 
 export type ProfileParamList = {
   +ProfileScreen: void,
   +EditPassword: void,
   +DeleteAccount: void,
   +BuildInfo: void,
   +DevTools: void,
   +AppearancePreferences: void,
   +PrivacyPreferences: void,
   +DefaultNotifications: void,
   +FriendList: void,
   +BlockList: void,
 };
 
 export type CommunityDrawerParamList = { +TabNavigator: void };
 
 export type ScreenParamList = {
   ...RootParamList,
   ...OverlayParamList,
   ...TabParamList,
   ...ChatParamList,
   ...ChatTopTabsParamList,
   ...ProfileParamList,
   ...CommunityDrawerParamList,
 };
 
 export type NavigationRoute<RouteName: string = $Keys<ScreenParamList>> =
   RouteProp<ScreenParamList, RouteName>;
 
 export const accountModals = [LoggedOutModalRouteName];
 
 export const scrollBlockingModals = [
   ImageModalRouteName,
   MultimediaMessageTooltipModalRouteName,
   TextMessageTooltipModalRouteName,
   ThreadSettingsMemberTooltipModalRouteName,
   RelationshipListItemTooltipModalRouteName,
   RobotextMessageTooltipModalRouteName,
   VideoPlaybackModalRouteName,
 ];
 
 export const chatRootModals = [
   AddUsersModalRouteName,
   ColorSelectorModalRouteName,
   ComposeSubchannelModalRouteName,
 ];
 
 export const threadRoutes = [
   MessageListRouteName,
   ThreadSettingsRouteName,
   DeleteThreadRouteName,
   ComposeSubchannelRouteName,
+  FullScreenThreadMediaGalleryRouteName,
 ];