Have there been any changes to comping menu? It seems to be missing completely in Artist.
This is what I've found:
https://www.cakewalk.com/Documentation?product=SONAR%20X3&language=3&help=Arranging.48.html
But when I right click on a clip in a take lane, the menu looks different altogether. I cannot see "delete muted takes" and "remove empty take lanes" either... I'm lost.
 

Never mind. I was clicking on a take lane, not the parental track, silly me...