It's based on a font called Omnicron that Dennis used with modifications on some of the Command Deck displays and so on. I took some of the letters and then cut them up and rearranged them to make symbols that looked like letters but weren't recognizable.
The idea for the control surface is that there are four sensor modes (the triangles), and you can drag the columns of icons for REC, SCAN and REV (as on a smartphone) to line up different combinations to do different things. I used to design video game interfaces so I automatically think a little about how to make something functional, even if it's never shown actually being used. It just "smells right" if it's thought out.