Added per-channel notification sound preference (#7479)

source/preferences/manage-your-channel-specific-notifications.rst

@@ -8,6 +8,7 @@ By default, your web and desktop notification preferences apply to all channels
 
 - `Mute channels <#mute-channels>`__
 - `Ignore channel-wide @mentions <#ignore-channel-wide-@mentions>`__
+- `Message notification sounds <#message-notification-sounds>`__
 - `Auto-follow all new threads <#auto-follow-all-new-channel-threads>`__
 
 .. tab:: Web/Desktop
@@ -48,26 +49,20 @@ By default, you're notified every time someone uses channel-wide :doc:`@mentions
 
 When you choose to ignore channel-wide @mentions in channels, the channel name is bolded in the channel sidebar for new unreads unless it's muted.
 
+Message notification sounds
+---------------------------
+
+From Mattermost v10.1, when you configure Mattermost to notify you about all new messages, or mentions, direct messages, and keywords only, on a per-channel basis, you can also specify an audible message notification sound to play for those notifications.
+
 Follow all new channel threads
 -------------------------------
 
 By default, you don’t automatically follow new conversation threads in any channel unless you start a thread or reply to a thread, follow a thread, or are @mentioned in a thread.
 
-You can configure Mattermost to automatically follow every thread in a channel.
-
-.. tab:: Web/Desktop
-
-  1. Select the channel name to access more channel options.
-  2. Select **Notification Preferences**.
-  3. Under **Follow all threads in this channel**, select **Automatically follow threads in this channel**.
-  4. Select **Save**.
-
-  Select **Threads** in the channel sidebar to access all threads you're following, and to unfollow threads you no longer want to follow.
-
-.. tab:: Mobile
+When using Mattermost on your mobile device, you can configure Mattermost to automatically follow every thread in a channel.
 
-  1. In a channel, tap the **More** icon |more-icon| to the right of the channel name.
-  2. Tap **View info**.
-  3. Tap **Follow all threads**.
+1. In a channel, tap the **More** icon |more-icon| to the right of the channel name.
+2. Tap **View info**.
+3. Tap **Follow all threads**.
 
-  Tap **Threads** in the channel list to access all threads you're following, and to unfollow threads you no longer want to follow.
+Tap **Threads** in the channel list to access all threads you're following, and to unfollow threads you no longer want to follow.