How can I swap channels in a stereo track, so what was left is now right and what was right is now left?
 
There used to be something called Channel Tools, but I think that bit the dust years ago.
 
Thanks.

Hi. Channel Tool is still alive and working.
https://www.cakewalk.com/Documentation?product=SONAR%20X3&language=3&help=Plug-ins.2.html
It's installed with the Engineering FX Suite.
It was going to be my suggestion.
All the best.

If you want a permanent fix, select the track and use Process > Apply Effect > Gain. You can put all of the right channel in the left channel, all of the left in the right, part of each channel in the other, etc. 

Thank you. If I go to Insert Audio Effect/Spatial + Panner, I can choose Channel Tools from the menu. 
 
But if I choose Insert Audio Effect/Uncategorized (which is what I did previously), I then see a different instance of Channel Tools, which does not work. I think this is an older version which was discontinued. Anyway, this led me to believe Channel Tools was no longer with us.

That Gain thingy looks good too. Thanks.
 

I think Channel Tools is easier to use for a quick fix. Maybe that's just me.
 

Panipulator has a Flip L/R switch too.