Hint for using punch-in with comping.

For those new to comping (like me), here's a hint that might be helpful.   In Edit > Preferences > Project > Record under "Auto Punch", the default seems to be "Mute Previous Takes".    Therefore when you have Comping on (in the same menu), playback will default to playing only the new take lane and muting the old one.   The muted clip waveform will show up as a "hollow envelope" and "Clip Mute/Unmute" in the menu will not unmute it (nor will the "K" key on the keyboard).   
 
The hint is this:  Before recording using punch-in with comping on, make sure the "Mute Previous Takes" box in the Record menu (above) is NOT checked.    Then, next time you playback, you can mute/unmute clips in the take lanes using either the (right click) menu or the "K" key.   
 
Maybe someone can suggest a workaround if you've already recorded with the "Mute Previous Takes" box checked.   If there is one I've not yet found it after lots of trying.
 
I am using SONAR Professional.   I do not know if issue is the same in other versions.
 
SOLUTION FOUND:   Scroll down in this thread and read my next comment regarding solution found at
"http://forum.cakewalk.com/Un-Mute-punch-in-SOLVED-m3331262.aspx"

Nice. A useful contribution indeed.

Pat, you are having exactly the same problem I had.   I couldn't figure out how to un-mute either and had to re-record. 
 
However, since the original post, I FOUND A SOLUTION in another thread.   A very knowledgeable user named "brundlefly" gives the solution in his answer to DeeringAmps' post called "Un Mute punch in SOLVED!".   This is at
"http://forum.cakewalk.com/Un-Mute-punch-in-SOLVED-m3331262.aspx"
 
You should read that post, but to summarize it, there is a hidden mute function (have to right-click the "Erase" button in one of the menu bars at the top (to the right of the Move, Edit, and Draw buttons) and change it to "Mute".   Then you just swipe the mouse over the portion of the muted waveform that you want to un-mute.
 
THANK YOU BRUNDLEFLY! - I would have never found this on my own.
 
 IMPORTANT UPDATE:  This is a little trickier than I first thought so I am adding this update.    When swiping, a swipe above the waveform un-mutes, a swipe below the waveform mutes.  

Here it is: https://www.youtube.com/watch?v=TPi1BkBhEvE
 At around minute 3:00 it explains what I was talking about.

+1 on the Thanks brundlefly!