the watch and listen buttons on newer mx980 remotes were interchangeable.  urc shipped a package of like 10 different labeled buttons.

they have been replaced by a single button labeled Main.  this main button toggles back and forth between the watch and listen pages.  you can hide one group of pages to make it so it doesn't toggle.

i actually didn't like the watch and listen buttons.  on simpler jobs it was difficult to decide what to stick in there.