The MX-500 can indeed learn Ctrl-Shift-P. You just have to hit them all and let them go very quickly.
The only trouble I have is that some keys (particularly, Backspace) sometimes "misfire" and either mute the audio (argh) or enable F-lock (argh, argh!)
I haven't found a way to remap them, other than using Girder
The only trouble I have is that some keys (particularly, Backspace) sometimes "misfire" and either mute the audio (argh) or enable F-lock (argh, argh!)
I haven't found a way to remap them, other than using Girder