Hello,
 
i know this function from other DAWs and find it very helpful:
 
Putting a track in "SOLO Safe" - Mode. By doing this, this track is always audible even if other Tracks has been "soloed".
Why would you need this? If you got an effects-bus and "solo-safe" it, you could, for example, solo the vocals bus, feeding into the effects-bus via send, and be sure that the effects are still audible. Same with the parallel-comp bus at drums etc.
 
Cheers, Axel
 

Yeah, I have one FR for this too, from a month ago.
 
Some call it Solo Exempt - like in Digital Performer.
 
Scook was kind enough to tip that there is Ctrl Solo which make this function but temporarily, not sticks with that track. Think Sonar call it Solo override.
 
The more permanent solution - like a checkbox on track you know is used as effect return and that stays as a property - would be good.

lfm
Yeah, I have one FR for this too, from a month ago...

 
Here:
http://forum.cakewalk.com/m3170165.aspx