When working on a spreadsheet, the Undo and Redo functions can be a big help. By default, Quattro Pro sets the level at 20, however you can increase (or decrease) the number of levels by doing the following:
1. Click Tools and select Settings.
2. In the left pane, expand Application and select General.
3. Input the desired value into the Undo/Redo Level textbox (a value between 0 and 200).
4. Click OK.