I am trying to make my buttons 100% transparent, so that all I see on the screen are icons; I've tried two different programs and have made the buttons transparent in every case, and yet when I upload the new file to the MX-810, the buttons always have a solid background. The net effect of this is that I can't see my customized background, since the black backgrounds of the 6 buttons hides it.

What am I doing wrong here?