Found a few threads - turns out I actually posted on one of them (I'd make a mental note to get my memory checked, except I'd probably forget).

I might just see if I can find my spare keys - Music for Roon, and Movie for TV/Film sounds like it might work well. Despite the above lapse, I have no problem remembering which keys control what, but my girlfriend is consistently confused as to why she would press DVD when she wants to play a Blu-ray and a CD, as well as DVDs, and whatever the hell SLS means when she would like to play music.

HC: 861v4/ID40/LPS, DSP5000, DSP5000VC, DSP3100, SW1600, HD621, Oppo BDP-105, Sony VPL-HW55ES
2-Channel: Oppo BDP-105, TEAC VRDS-7/Trichord Clock 3/PSU, 551, Quad 303, Harbeth Compact 7ES-3, Kimber cables, Russ Andrews mains and supports.
Previous Meridian: 5000C, 5200SL, 7200.2, 6000, 562V.2, 568.2mm, 800v4, 808.2i, 818v2/v3, 861v8, 502