Practically all dialogs have the following 3 standard buttons. The buttons work in the same way in all dialogs.

OK: Saves the changes to the current dataset in the database and closes the dialog.

✍ If the "Read-only mode" is switched on the button cannot be activated as it is grey.

Cancel: Closes the dialog and rejects the changes to the current dataset.

Apply: Saves the changes to the current dataset in the database; the dialog remains open.

✍ If the "Read-only mode" is switched on the button cannot be activated as it is grey.