Redo

  Choose Redo to reinstate the most recently canceled edit.  You
  can reinstate only a single edit by choosing Redo.

  Choose Undo to cancel your most recent edit.

  The Notepad editor defines a single edit as all keystrokes
  entered since the last time you either pressed the Delete key
  or repositioned the cursor by moving the pointer and pressing
  MB1.

  Additional topics:

  *   Undo

  *   Undo...

  *   Cut

  *   Copy

  *   Paste

  *   Clear

  *   Select All