Sorry for the basic question. I couldn't find the answer in the manual.

Update: I copied and pasted the audio from one track to the other, but would still be interested to know if there's a simpler way to do this from the menu?

It's a little bit tucked away, but I think this is what you want:

One of the most hidden features in the program!

Ah, thank you! Thread resolved

Excellent. Consider opening your original post and pressing the Mark As Resolved button at the bottom of the form. This can assist others in future also.

Ahh, so that's how it's done! Been on these forums for about 2 years and never knew (I am clearly not very observant). Marked as resolved.

If you would like a quick way to access it
https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=627329
you can add any function you like to it.

Pretty slick little script there Pipeline! Thanks for posting that link.

Jeff