If more than one device is connected, and you want to switch the input, you would have to search all the buttons behind the 2nd press from below. I believe.
Volume is still oblique: Lauter's well with the 3rd button from the bottom, quieter but only if you wanted to make previously louder with the 4th Light. Otherwise, on the 4th button something like an image booster ....
Well. Somehow I have arranged with me. But if I could wish for something, then it would be an improved operating feature!