2.10. To Undo or Redo Operations

To undo a change, choose Edit->Undo. To redo an change, choose Edit->Redo. The number of previous changes that you can undo is unlimited in GChemPaint

If you are editing a text or a fragment, you can undo/redo each change done since the begin of your edition operation. If you end the edition of such an object, you can only undo or redo the whole edition operation.