When you accidentally cut away some text and need to undo your last action using such apps as Mail or Notes, you can tap the Undo key on the Number keyboard. To redo, switch to the Symbol keyboard, then tap the Redo key. As an alternative, you can also shake your device to undo and redo, like this:
- After deleting some text, hold your iPad firmly with your both hands and give it a quick shake, and the Undo button slides in for you to undo.
- To redo, shake it again, but don’t drop your iPad!