Dave Merrill
Axe-Master
Double-pressing B takes you to DRIVE 1 (I remember it as BOOST), D to DELAY 1.I also spent some time when I first got the unit learning the front panel controls and I'm glad I did. It would be helpful for you to know how to make quick adjustments to the blocks and move them around the grid using the TOOLS view, even for fine-tuning things at practice.
Also a couple of really handy surprises - double-pressing knob A or C from the home screen takes you to AMP 1 and CAB 1 respectively. I've forgotten what the other knobs do when double pressed but this is really sweet.
Helpfully, it works out to be:
A - Amp
B - Drive (Boost)
C - Cab
D - Delay