Nearly all changes you make in RevMan can be undone with the Undo function. The maximum number of possible undo actions is determined by the Undo History Size setting, which you can specify under General preferences.
To undo an action
Click the Undo button.
To redo an action
Click the Redo button
Tip: Pause the pointer over the Undo or Redo button to see a tool tip describing what will happen if clicked.