It would be fun to have the background so that it could be color coded (user adjustable) for various temperature ranges.  Such as one color from 0 up to 300f where drying phase usually ends.  Then the next color area would extend to first crack at 390f.  Then maybe a third that ends where you usually stop your roast.  Another for MET max so you can easily see when MET is getting beyond your comfort zone.  (too hot)