I have been flying FS 2020 since its arrival in 2020.  Your Boeing 777 is my favorite airliner.  Recently, I had to uninstall and reinstall the program because of crashes which were not repairable using the standard procedure.  I have just reinstalled both the 767 and the 777 and I'm having difficulty with the vertical speed selection.  After dialing in desired altitude, I cannot get the vertical speed button to work.  Supposed to press it, which illuminates it, then you dial in your desired vertical speed.  I am not getting a button illumination and the system is inoperative.  To ensure program integrity, I tried the Asobo 787 and 747 and this feature worked great on both of them.  Am I doing something wrong with your iteration of the model?