GiD reference manual : Undo/Redo (only Preprocessing)

Menu: Utilities->Undo

Do the undo of the last command done

Menu: Utilities->Redo

Revert the last undo, if any

Menu: Utilities->Undo multiple...

With this command you can undo multiple last commands in a window.

To do this, select from the list of operations in the window the commands to be reverted, and click undo.

Menu: Utilities->Redo multiple...

With this command you can redo multiple last undo commands in a window.