To: laughinglion
Hello,
Do you have the latest version
AVS Video Editor 5.1? Unfortunately, it is not possible to disable video of main video and video overlay tracks in this new version, however you can handle audio tracks of them both on Timeline. It is possible to split and delete parts of the clips using
Split button. Also, you can adjust volume balance of both main and video overlay lines using
Volume and Balancebutton or you can simply mute video overlay sound.
Here you can find the details how to manage Timeline.
I hope it helps.
Best regards.