Zooming factor at 98% on 7" LCD

Hey guys,

I just noticed that, when using the ctrl-key on a keyboard and the mouse wheel, I can zoom in or out of the Volumio screen on my 7" LCD screen (800x480).
I just have one problem: when setting it at the default of 100% I have scroll bar on the right hand side on the “playback-screen”. This scroll bar however, is absolutely useless because everything is visible. I just annoys me; touching the screen can make it move up or down. If I would be able to set the zoomfactor at 98% (or maybe even 99%) this scrollbar would disappear together with my problem :wink:
Unfortunately with the CTRL key and the mouse I can only switch in steps of 10%. Anybody who knows how to change in steps of a single 1% ?