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

Vim documentation

      or                  *undo* ** *u*
u           Undo [count] changes.  {Vi: only one level}

                            *:u* *:un* *:undo*
:u[ndo]         Undo one change.  {Vi: only one level}

                            *CTRL-R*
CTRL-R          Redo [count] changes which were undone.  {Vi: redraw screen}

                            *:red* *:redo* *redo*
:red[o]         Redo one change which was undone.  {Vi: no redo}

                            *U*
U           Undo all latest changes on one line.  {Vi: while not
            moved off of it}