The disadvantage of this is that there is no visual cue to the user that additional controls will appear.
Not every user will spend time hovering over your entire UI, searching for controls that you've hidden away.
This is a one-dimensional design decision. "UI looks cluttered, lets hide some stuff. Wow that looks better!". But from the viewpoint of a new user, you've just created a barrier.
Not every user will spend time hovering over your entire UI, searching for controls that you've hidden away.
This is a one-dimensional design decision. "UI looks cluttered, lets hide some stuff. Wow that looks better!". But from the viewpoint of a new user, you've just created a barrier.