Unsure of Name

[5DV17U]

Hi,

Apologies in advance, but what is the bottom bar that has Play, FF, RW. skio called?

When you go fullscreen, it displays on screen and In would like it off.

I use a wireless mouse and any vibration brings it back.

I can turn the mouse off, but a pain.

I use MAC, but sure this would be generic and no doubt asked before.

Thanks