So let's say you haven't quite got the hang of inserting text and you've just typed something very wrong. Will you have to delete all the text and start over?
Nope - if you catch your errors quickly (like, right after you make them), you can always undo them. To undo any inserted text, hit the Escape key, then type u. It will undo the last action you did.
If you're already in edit mode, just type u to undo your last action.
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