Hey! I am just starting out on the VS20 with the Guitar Tracks software, but I can't seem to figure out how to bounce or mixdown a couple of tracks to another single track. Back in the day we called it Ping-Ponging. Any help would greatly be appreciated

It seems impossible to find a user manual for GT online, so the best bet would be to use the "Help" option on GT for the details. The option to bounce/mixdown is most likely in the "Tracks" or "Tools" menus with multiple tracks selected, but it has been so long I forget the UI on it.
 

If you get stuck I found quite a few videos on YouTube searching for "vs20 guitar tracks". You might find something in one of them.

What I ended up doing is soloing the tracks I want to bounce and then export them as a wav and then import them back into the project! Its a bit tedious but it seems to get the job done. Thanks for the replies!