docs/main/end-user-guide/preferences/manage-your-sidebar-options.mdx
Using Mattermost in a web browser or the desktop app, you can customize your Mattermost sidebar based on your preferences. Select the gear icon next to your profile picture, then select Sidebar.
Your channel sidebar includes enhanced sidebar features, including custom, collapsible channel categories, drag and drop, unread filtering, channel sorting options, and more.
<Note>You can control whether unread channels are grouped together separately in the channel sidebar, unless your system admin has disabled your ability to do so.
Select Sidebar Settings > Group unread channels separately > Edit to group unread channels at the top of the channel sidebar in an Unreads category.
You can set the default number of direct messages to show in the channel sidebar.
Select Sidebar Settings > Number of direct messages to show > Edit to define a default number of direct messages.
You can update the number of direct messages displayed in the channel sidebar at any time, regardless of the default you set. See the manage direct messages documentation for details.