After using the ATC mode for a fair amount of time, I’ve noticed that some pilots get confused when you give them certain commands such as “line up and wait”. To solve this, you could add a tip of the day. Or maybe possibly you could also add a help page at the top of the main menu like these posts suggest:
After using the ATC mode for a fair amount of time. I have noticed that many pilots mistake “line up and wait” with “hold short of runway”. I think that there should be another misc. message that says something along the lines of “You were told to line up and wait on the runway.” or "You were told to hold short of runway " because I do find it annoying when I have to just give them takeoff permission when I’m controlling a busy airport.