Very nice! If there was a feature that allowed you to add text/objects to a range of frames as opposed to having to do it for each individual one, then I'd use this quite often!
There is! Or rather, right now, you can add an object to a single frame or to all frames, there's a menu just below the tool buttons letting you do that. I might add a "custom" option there as we'll, so that the user can specify an exact range of frames to apply the object to.