I disagree. I prefer a volume block after the amp and cab, before the ambient FX. That way I can do volume swells without altering the amp gain.
After looking into it I’ve discovered that you can set it up on the output and it doesn’t affect the effects.
It’s in the manual.
GLOBAL VOLUME PEDAL SETUP
The Axe-Fx III allows remote control of the volume at all input and output blocks. If you have a second pedal, or if you want to use one pedal for global volume instead of expression, follow the instructions below to set it up.
Adjusting Input volume affects gain/distortion and the behavior of level-dependent blocks like the compressor or gate.
Adjusting Output volume does not affect level-dependent blocks, but scales everything you hear including effect tails. For all other volume options, you can insert a Volume block anywhere in your preset and control it with a pedal as described in “Modifiers” on p. 145.
First ensure that you have an expression pedal connected and ready to use. Then:
1. From the Home page, open SETUP: MIDI/Remote: Other.
2. NAV to the entry for the volume you want to control: Input 1, 2, 3, or 4, or Output 1, 2, 3, or 4.
3. Turn the A or VALUE knob to assign a controller to your selected entry.
Select “PEDAL 1 or PEDAL 2” for the onboard Expression jacks
Select “FC__ PEDAL __” for a pedal connected via an FC series controller.
Select a number if your pedal is transmitting a MIDI CC#. For example, by default, the Fractal Audio