If I can get into a place where I can crank the amp a bit I sometimes use this setting if I want to control the gain with my Vol knob!

Flip it to Jazz setting and leave it in OD. Input vol around 12 Oclock master 12 or 1 o'clock (30% tapers).Tone set to taste and the overdrive set for enough gain to give you some snarl (like a Tweed Deluxe cranked) with the guitar full up!
From that setting, I roll back my volume knob and the amp cleans up perfectly is touch sensitive with a bit of compression and bloom. Roll it up to bleed in more gain and full up for solos and the thing rips!..Of course you can do that on the rock side as well however IMO is harder to get totally clean and still have some headroom and volume as well is a bit more challenging to control. This works even better with my D-lator ( I actually prefer the clean tone better than just the straight clean channel!) My fave guitar to use on this setting is my stock AVRI Telecaster and all 3 pickup selector settings are clear and well balanced with the volume rolled back. From there if you want over the top just hit the boost take out the stack go to the bridge and it's off to the races. This IMO is how JB may be running his given he is constantly riding his Volume knob.

Your mileage may of course very
Tony