Is it possible that this feature could be developed? It could be on settings as an option.
You need to place feature requests on the feedback site
Do you not get on with using the Space bar to pan? Or are you using a tablet or something that does not a readily available spacebar? I tried using a Cintiq Companion without a keyboard years ago, and it just wasn't working for me.
One of the best best tools for panning is the spring loaded H key. When you press H and left click pan, the documet zooms back so you can see it all, with a zoom sized box overlay to show where you'll be when you relese the mouse.
Using my Logitech G502 Gaming Mouse and Software and Photoshop Preferences I can do many things with the mouse wheel. Setting Photoshop Preference tools section to Zoom with mouse wheel lets me zoom in on the image so it does not fit on the screen. Logitech Gaming Software lets me set the Wheel center Click to Space Bar to switch to the hand tool so I can use the left mouse button to pan with the mouse.
Also Gaming Keyboards and Keypads
if you have G502 or similar you can solve this with a macro!!!
now when you hold down the middle mouse wheel it will pan around in photoshop
make sure you have over scroll is on in photoshop Tools / Preferences
it doesn´t work with the middle mouse button
I have an older MS design mouse (the wheel can click Middle, Left and Right though) and use Microsoft Mouse and Keyboard Center.
I didn't have to do anything to get this; it's basic functionality built-in.
It moves the bottom scroll bar with small increments (and I never use it).