I’ve never tried to be honest. I’ll have a look at the SPAD config tonight. Those two values are shown when the left rotary is set to either ALT or VS. We may be at the mercy of what SPAD can allow us to change. I know it can do IAS when you have IAS selected, I just don’t know whether that can be displayed elsewhere.
They are pretty flexible though. As an exercise, I decided to make one of my radio panels display a radar altimeter output, even though the plane I was flying doesn’t have it. Its just a simvar to be displayed, and it worked really well, so who knows.