Looking for "instruction"(?) suggestions

[MPTech]

I have an empty black area directly below the monitor and above the control panel that is about 7 - 8" tall and 25" wide that I would like to fill with something.  I thought of instructions, but I don't want to confuse anyone, as I use my Mame Arcade for playing many different games and the buttons are not the same for all of the games.

suggestions?

[bennyfactor]

Here's one i've been playing around with. it's still in its early stages, but it might give you some ideas