(Crosspost from r/emulation)

I'm using the current build of Retroarch (1.7.6) along with a triple monitor setup, one of which is a PC CRT.

I've found that Retroarch's resolution list is tied to the primary display, and so when I game on the CRT, in order to maintain say 1600x1200 resolution, I either have to make the CRT the primary display or add that resolution to my main screen via CRU, which it switches to when I try to change my CRT res in Retroarch settings (not-ideal).

So the question:

Is there a specific file or directory I can change to force Retroarch to use the resolution list for a specific, non-primary display or to not affect the primary display when resolution switching? Or in other words to only affect the display RA is active on?