How do I do redo (i.e. “undo undo”) in Vim?

Question

In Vim, I did too much undo. How do I undo this (that is, redo)?

Answer 1

Refer to the "undo" and "redo" part of Vim document.

:red[o] (Redo one change which was undone) and {count} Ctrl+r (Redo {count} changes which were undone) are both ok.

Also, the :earlier {count} (go to older text state {count} times) could always be a substitute for undo and redo.