The User tab ribbon is a custom (quick menu). It is used to manage user navigation in a Set of Books. This You may select (tick) the Auto-learn feature to add the last accessed options in up to six (6) groups.
By default, when opening the Set of Books, the Action ribbon will be displayed. It the User tab ribbon, is activated, the User tab ribbon will automatically be displayed when opening the Set of Books.
You may edit the User tab.