Is there a way to add/change the hotkeys for the Radius/Opacity of a Paint or Capturelayerpaint node? I looked in the Hotkeys window and all the entries after searching “brush” seem to be related to what I'm looking for but no “radius” or “opacity” to be found.
Is there an “adjust opacity” hidden hotkey, like “adjust radius” seems to be - shift+LMB/RMB?

edit:
Also the “Show/Ghost/Hide Other Objects” view mode says on mouse hover that its hotkey Y is not set. Where should that be set? Looked all over the place in the Hotkey manager and prefs.