[No QA] Docs updates for E/A#95217 document marking a chat or message as unread

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

docs/articles/new-expensify/chat/Mark-a-Chat-or-Message-as-Unread.md

@@ -0,0 +1,116 @@
+---
+title: Mark a Chat or Message as Unread
+description: Learn how to mark a chat or an individual message as unread in New Expensify, mark a chat as read again, and how the New marker shows where you left off.
+keywords: [New Expensify, mark as unread, mark as read, unread chat, unread message, New marker, new message marker, unread indicator, come back to a message later]
+internalScope: Audience is all Expensify members. Covers marking an individual message as unread, marking a whole chat as unread or read, and how the New marker behaves. Does not cover Inbox tabs and filters, priority mode, or pinning chats.
+---
+
+# Mark a Chat or Message as Unread
+
+Marking a chat or a single message as unread is a way to flag something you want to come back to. The chat stays bold in your Inbox, and a green **New** marker appears above the message you marked so you can find your place again when you return.
+
+This is available to every member on web, desktop, and mobile, and it only changes what you see. Other members in the chat aren't notified and their own read state doesn't change.
+
+---
+
+## How to mark a message as unread in New Expensify
+
+Use this when you want to come back to one specific message in a conversation.
+
+**Web:**
+
+1. Open the chat.
+2. Right-click the message you want to flag.
+3. Select **Mark as unread**.
+
+**Mobile:**
+
+1. Tap the chat to open it.
+2. Long-press the message you want to flag.
+3. Tap **Mark as unread**.
+
+The chat then shows as unread in your Inbox, and the green **New** marker appears directly above the message you selected. You can do this with your own messages as well as messages from other people.
+
+<!-- SCREENSHOT:
+Suggestion: A chat message with its context menu open, showing the Mark as unread option
+Location: After the web and mobile steps in the "How to mark a message as unread in New Expensify" section
+Purpose: Members often look for this option in a settings page or the chat header rather than the message's own menu, so showing the menu confirms where it actually lives
+-->
+
+---
+
+## How to mark a chat as unread in New Expensify
+
+Use this when you want to flag a whole conversation rather than one message.
+
+**Web:**
+
+1. Right-click the chat in your Inbox.
+2. Select **Mark as unread**.
+
+**Mobile:**
+
+1. Long-press the chat in your Inbox.
+2. Tap **Mark as unread**.
+
+**Note:** **Mark as unread** appears for a chat only when that chat is currently read.
+
+---
+
+## How to mark a chat as read in New Expensify
+
+**Web:**
+
+1. Right-click the chat in your Inbox.
+2. Select **Mark as read**.
+
+**Mobile:**
+
+1. Long-press the chat in your Inbox.
+2. Tap **Mark as read**.
+
+**Note:** **Mark as read** appears for a chat only when that chat is currently unread, and it applies to the whole chat. It isn't available on an individual message.
+
+---
+
+## What the New marker shows you
+
+The **New** marker is a green line labeled **New** inside a chat. It sits directly above the oldest message you haven't read yet, so everything below it is new to you.
+
+When you mark a message as unread, the marker anchors to that exact message instead. It stays on that message while you're in the chat, even if other members send new messages in the meantime.
+
+A message you just sent never gets a **New** marker above it. If you want the marker on something you wrote, mark that message as unread.
+
+<!-- SCREENSHOT:
+Suggestion: A chat showing the green New marker line above a message, with later messages below it
+Location: After the first paragraph of the "What the New marker shows you" section
+Purpose: Members describe this marker in different ways when asking for help, so showing it makes clear which element the article is talking about
+-->
+
+---
+
+## How long the New marker stays on a message
+
+The marker stays anchored to the message you marked for as long as you're in that chat, and the chat stays unread in your Inbox after you leave it.
+
+Opening the chat again marks it as read and clears the marker. If you still want to come back to that message later, mark it as unread again before you leave.
+
+---
+
+# FAQ
+
+## Can I mark my own message as unread?
+
+Yes. Marking one of your own messages as unread flags the chat and puts the **New** marker above that message, exactly as it does for a message from someone else.
+
+## Why don't I see Mark as read when I right-click a message?
+
+**Mark as read** applies to a whole chat, not to a single message. Right-click, or long-press on mobile, the chat in your Inbox instead, and the option appears there when that chat is unread.
+
+## What happens to the New marker if I delete the message I marked as unread?
+
+The marker moves to the next unread message in the chat rather than disappearing.
+
+## Does marking a chat or message as unread affect anyone else?
+
+No. Read state is per member, so this only changes your own Inbox and your own view of the chat. No one is notified.