cheat sheets.

Cheat Sheet for Emacs undo-tree mode
http://www.dr-qubit.org/undo-tree/undo-tree.el

C-_  C-/  (`undo-tree-undo')
  Undo changes.

M-_  C-?  (`undo-tree-redo')
  Redo changes.

`undo-tree-switch-branch'
  Switch undo-tree branch.
  (What does this mean? Better press the button and see!)

C-x u  (`undo-tree-visualize')
  Visualize the undo tree.
  (Better try pressing this button too!)


In the undo visualizer:

<up>  p  C-p  (`undo-tree-visualize-undo')
  Undo changes.

<down>  n  C-n  (`undo-tree-visualize-undo')
  Undo changes.

<left>  b  C-b  (`undo-tree-visualize-switch-branch-left')
  Switch to previous undo-tree branch.

<right>  f  C-f  (`undo-tree-visualize-switch-branch-right')
  Switch to next undo-tree branch.

t  (`undo-tree-visualizer-toggle-timestamps')
  Toggle display of time-stamps.

q  C-q  (`undo-tree-visualizer-quit')
  Quit undo-tree-visualizer.

,  <
  Scroll left.

.  >
  Scroll right.

<pgup>
  Scroll up.

<pgdown>
  Scroll down.