In the Save section, set the Auto-Save parameters:
Interval (minutes): The frequency at which auto-save happens.
Inactivity Interval (seconds): When Auto-save is about to take place, it verifies if you are drawing or doing anything in the application. Auto-save will not happen until you have stopped using the application for this amount of seconds.
Ask Before Saving: Before performing an auto-save, you are prompted with a message to confirm if you want to save or not.
Enabled: This enables the Auto-save feature. If you do not want the system to automatically save your work, uncheck this option. Auto-save is off by default.