Salut @jb07
The dedicated Pan rotary will control pan for the selected channel when sending a mono Input or Group to a stereo bus/mix.
It will also control balance when sending a stereo Input, FX Return or Group to a stereo bus/mix.
To prevent inadvertent changes, it does not control the output balance of the Main LR bus or an Aux, but this can be adjusted (as @Nudgy shows) in the Routing screen.
(As described here – https://www.allen-heath.com/media/SQ_ReferenceGuide_V1_5_0.pdf#page=40&zoom=auto,-361,573 ).
On balance (pun intended), it’s done this way because output balance is usually something that would be set at the beginning of the show or session then left, and definitely not something you’d want to accidentally adjust during mixing.
Quick plug for one of my favourite little extras in V1.5 – holding the ‘Reset’ key and adjusting the Pan rotary (where available) allows you to quickly jump between hard left/centre/hard right positions.
Cheers,
Keith.