Undoing and recovering
The last piece of the pattern is recovery. If an action didn’t do what you
wanted, u undoes it. Press u again to step further back through your
history, as far as you need.
If you undo too far, U (capital U) redoes — it walks forward through the
same history.
This safety net means you can try things freely. Select, act, and if you
don’t like the result, press u.
Work through the checklist below.