diff --git a/docs/_data/_routes.yml b/docs/_data/_routes.yml
index 1362b0a79165..3d5fa60808f5 100644
--- a/docs/_data/_routes.yml
+++ b/docs/_data/_routes.yml
@@ -108,6 +108,8 @@ topics:
         href: /articles/new-expensify/chat/Chat-Features-and-Moderation-Tools
       - label: Organize your Inbox
         href: /articles/new-expensify/chat/Prioritize-and-Pin-Chats
+      - label: Mark chats as unread
+        href: /articles/new-expensify/chat/Mark-a-Chat-or-Message-as-Unread
 
   - title: Reporting
     icon: /assets/images/envelope-receipt.svg
diff --git a/docs/articles/new-expensify/chat/Mark-a-Chat-or-Message-as-Unread.md b/docs/articles/new-expensify/chat/Mark-a-Chat-or-Message-as-Unread.md
new file mode 100644
index 000000000000..1a6336ceaccd
--- /dev/null
+++ b/docs/articles/new-expensify/chat/Mark-a-Chat-or-Message-as-Unread.md
@@ -0,0 +1,83 @@
+---
+title: Mark a Chat or Message as Unread
+description: Learn how to mark a chat or an individual message as unread in New Expensify so you can come back to it later.
+keywords: [New Expensify, mark as unread, mark as read, unread messages, New line, chat, Inbox]
+internalScope: Audience is all New Expensify members. Covers marking an individual message or a whole chat as unread or read from a chat and from the Inbox, does not cover Inbox filter tabs, priority mode, pinning, or notification settings.
+---
+
+# Mark a Chat or Message as Unread
+
+Mark a chat or an individual message as unread when you want to come back to it later. The chat name stays bold in your **Inbox**, and a green **New** line appears above the message you marked so you can find your place again.
+
+---
+
+## How to mark an individual message as unread
+
+Web:
+
+1. Open the chat from your **Inbox**.
+2. Hover over the message, then select the three dots **(⋮)**.
+3. Select **Mark as unread**.
+
+Mobile:
+
+1. Open the chat from your **Inbox**.
+2. Long-press the message.
+3. Select **Mark as unread**.
+
+You can mark any message as unread, including a message you sent yourself.
+
+<!-- SCREENSHOT:
+Suggestion: A chat with the green New line displayed directly above a message the member just marked as unread
+Location: After the steps in the "How to mark an individual message as unread" section
+Purpose: Confirms the action worked, since the only on-screen result is a thin green line that members often miss
+-->
+
+---
+
+## How to mark a whole chat as unread or read from your Inbox
+
+Web:
+
+1. Right-click the chat in your **Inbox**.
+2. Select **Mark as unread** or **Mark as read**.
+
+Mobile:
+
+1. Long-press the chat in your **Inbox**.
+2. Select **Mark as unread** or **Mark as read**.
+
+**Mark as unread** appears only when the chat is currently read, and **Mark as read** appears only when the chat is currently unread. **Mark as read** is available for a whole chat only, not for an individual message.
+
+---
+
+## What happens after you mark a message as unread
+
+- The message you marked, and every message after it, counts as unread.
+- The chat name is bold in your **Inbox** and is counted in the **Unread** tab.
+- A green **New** line appears above the message you marked.
+- Nobody else is notified, and nothing changes for the other people in the chat.
+
+---
+
+# FAQ
+
+## Can you mark a message you sent yourself as unread?
+
+Yes. Marking your own message as unread works the same way as marking someone else's message, and the green **New** line appears above it.
+
+## Does a message you just sent get a green New line above it?
+
+No. A message you send is never treated as unread, so no green **New** line appears above it. If you want the line there, mark that message as unread.
+
+## How long does the green New line stay in a chat?
+
+The line stays anchored to the message you marked, including when you leave the chat and come back to it. It clears once Expensify treats those messages as read, which happens as you keep using the chat. If the line is gone and you still need it, mark the message as unread again.
+
+## Does marking a chat or message as unread notify anyone else?
+
+No. Read state is personal to your account, so marking something as unread never changes what other people in the chat see.
+
+## Where can you find all of your unread chats?
+
+Select the **Unread** tab at the top of your **Inbox** to see only the chats with unread messages. Learn more about [navigating New Expensify](/articles/new-expensify/getting-started/Navigating-New-Expensify).