Organizing collections in the menu bar
You can arrange the order of the collections in the menu bar and specify whether the All collection should be displayed.
By default, all posts are included in the All collection whether they are in another collection or not. If you do not want the All collection to appear in your hub menu, you can turn it off and choose which collection should be displayed as the home collection that users see first.
Categories appear in a vertical list on the Collections and Tags page. The categories at the top of the list appear on the left side of the menu bar.