I finally started using Bandlab and I'm enjoying it so far.  In the older days I couldn't find a convenient way to expressly mark the beginning and end of my project for an export mix.   I had to highlight the time ruler bar and then export that making sure I got the highlighted section just right.  Maybe there was an easier way I just didn't know about. Is there a way to tell Bandlab exactly where your export mix will begin and end and never have that change that unless you move the marker