Reverses the last action. TAGGON is capable of reversing up to the last ten actions.  If you publish your page the Undo history will be reset and further Undoing will not be possible.

Redo
Reinstitutes the last action.  TAGGON is capable of reinstituting up to the last ten reversed actions.  If you publish your page the Redo history will be reset and further Redoing will not be possible.