Mark channels as favorites
You can mark public and private channels, as well as direct and group messages as favorites so they’re easy to access later. Favorite channels display in the Favorites category in the channel sidebar.
To mark a channel as a Favorite:
Open a channel.
Select on the star icon next to the channel name.
At the top of the page, select the icon next to the channel name.
To remove a channel from your Favorites list, select the icon again.
Alternatively to mark channels as favorites, select the channel name, select the View Info icon, then select Favorite in the right pane. Select Favorited to remove the channel from your list of favorites.
Tap the channel you want to mark as a favorite.
Tap the More (…) icon located in the top right corner of the app.
To remove a channel from the Favorites list, tap the Favorited option.