Tap on the tab with a plus sign. Type your description and OK
The text of a tab can be changed with tap&hold on any given tab
You can create up to 99 tabs per grade book. In order to view them all, simply scroll up&down so that they appear on screen.
Additionally, you'll be able to hide specific tabs with a tap&hold.
Unhiding a tabTo show again a hidden tab. Tap on Tools/Hammer icon (top bar) and Tabs. Tap then on the eye next to the hidden tab