Normally it is not required to change this setting. This setting controls whether Promote Control will attempt to save camera settings it tries to alter in order to perform the requested operation, and restore them when done. By default Promote Control will try to return the camera to the same state it was in before an exposure sequence was started. If you prefer to have the camera settings remain at values after exposure sequence is done, disable this setting. Normally it is not required to change this setting.