How do you undo delete on notability?

To undo a deletion in Notability, you can shake your device to bring up the "Undo" option, or tap the "Edit" button in the top right corner and select "Undo" from the menu. If you're using the ipad, you can also use the three-finger swipe left gesture to undo. Additionally, if your notes are synced with iCloud, you might be able to restore older versions of your notes from there.