Hi guys!
You can assign a hotkey for that, by pasting "ToggleSolo" = "(Alt+A)" in your Shortcuts txt. I use it like 100times per day. Ultra timesaver.
And it works perfeclty fine in old AE CC (12.2).
But completely doesnt in everything that is newer.
I searched and asked, but in space, no one can hear you scream...
Anyone?)) Thanks!