In key filter popup window (both on gate and compressor pages) left and right arrows don't do anything. It doesn't matter key is on or off.
Maybe it's time to set solo button in channel edit page volume fader on the right? It has pan and mute buttons already but why no solo? :)
And still asking for visible mute buttons when mixer is in SoF mode :)
Mixer Model: XR18
App Version: 1.0.3 (86)