It seems natural for me to roll/pull the wheel back toward me and have the view zoom in toward me. Roll/push the wheel away from me and the view zooms out away from me.

I suppose the difference is if it is the view that is being pulled and pushed in response to the wheel, or the observer leaning in closer or moving back farther away.

Service To The Line,
On The Line,
On Time

US Army Ordnance Corps.