It would be more like a "visibility" toggle than an opacity one (same as right click->object properties->hide)... The problem would be that if you hide an object and you select something else, you'd have no easy mean to find it back.
It would be more like a "visibility" toggle than an opacity one (same as right click->object properties- >hide). .. The problem would be that if you hide an object and you select something else, you'd have no easy mean to find it back.