Why do you have to preview/ render animation prior to adding exposure?

Is it possible to make it so the Extend Exposure shortcut / Decrease Exposure shortcut works even when the animation has not been rendered/ previewed/ played for the first time? Whenever I do not play the animation, these shortcuts do not work until the animation has been played. This is also the case for any new drawing / frame created after the animation was played once. It needs to be a drawing that has been ‘played’ before adding an exposure via the shortcut,