An operation can be undone even if you saved the synthetic after performing the operation that you now wish to undo. Undo (
) and redo (
) buttons appear both on the main toolbar and on the Log Editing toolbar. Note that the undo and redo buttons on the Log Editor toolbar affect any operation done throughout GeoSyn, not just those that were done using the Log Editor. To hone in on a specific change to either undo or redo, click Edit > Undo or Redo.