diff --git a/web/chat/chat-thread-list-item-menu.react.js b/web/chat/chat-thread-list-item-menu.react.js
--- a/web/chat/chat-thread-list-item-menu.react.js
+++ b/web/chat/chat-thread-list-item-menu.react.js
@@ -1,6 +1,5 @@
 // @flow
 
-import classNames from 'classnames';
 import * as React from 'react';
 
 import {
@@ -17,6 +16,7 @@
   useDispatchActionPromise,
 } from 'lib/utils/action-utils';
 
+import Button from '../components/button.react';
 import SWMansionIcon from '../SWMansionIcon.react';
 import css from './chat-thread-list.css';
 
@@ -74,19 +74,22 @@
   }`;
 
   const menuIconSize = renderStyle === 'chat' ? 24 : 16;
-  const btnCls = classNames(css.menuContent, {
-    [css.menuContentVisible]: menuVisible,
-  });
+
+  let btn = null;
+  if (menuVisible) {
+    btn = (
+      <Button variant="unread" onClick={toggleUnreadStatus}>
+        {toggleUnreadStatusButtonText}
+      </Button>
+    );
+  }
+
   return (
     <div className={css.menu} onMouseLeave={hideMenu}>
       <button onClick={toggleMenu}>
         <SWMansionIcon icon="menu-vertical" size={menuIconSize} />
       </button>
-      <div>
-        <button className={btnCls} onClick={toggleUnreadStatus}>
-          {toggleUnreadStatusButtonText}
-        </button>
-      </div>
+      <div>{btn}</div>
     </div>
   );
 }
diff --git a/web/chat/chat-thread-list.css b/web/chat/chat-thread-list.css
--- a/web/chat/chat-thread-list.css
+++ b/web/chat/chat-thread-list.css
@@ -160,6 +160,7 @@
 .menu {
   position: relative;
   display: flex;
+  padding: 5px;
   justify-content: flex-end;
 }
 .menu > button {
diff --git a/web/components/button.css b/web/components/button.css
--- a/web/components/button.css
+++ b/web/components/button.css
@@ -32,3 +32,16 @@
   border-radius: 50%;
   padding: 0;
 }
+
+.unread {
+  background: var(--unread-btn-bg);
+  color: var(--fg);
+  position: absolute;
+  z-index: 1;
+  font-size: var(--xs-font-12);
+  font-weight: var(--semi-bold);
+  top: 0;
+  right: 25px;
+  width: max-content;
+  padding: 10px;
+}
diff --git a/web/components/button.react.js b/web/components/button.react.js
--- a/web/components/button.react.js
+++ b/web/components/button.react.js
@@ -8,7 +8,7 @@
 type Props = {
   +onClick: (event: SyntheticEvent<HTMLButtonElement>) => void,
   +children: React.Node,
-  +variant?: 'primary' | 'secondary' | 'danger' | 'round',
+  +variant?: 'primary' | 'secondary' | 'danger' | 'round' | 'unread',
   +type?: string,
   +disabled?: boolean,
   +className?: string,
diff --git a/web/theme.css b/web/theme.css
--- a/web/theme.css
+++ b/web/theme.css
@@ -96,4 +96,5 @@
   --disconnected-bar-connecting-bg: var(--shades-white-70);
   --disconnected-bar-connecting-color: var(--shades-black-100);
   --permission-color: var(--shades-white-60);
+  --unread-btn-bg: var(--shades-black-80);
 }