No zooming or panning in sculpting mode

So I’ve been enjoying the blender 2.8 sculpting. But I must have inadvertently pushed a wrong button or my file got corrupted because i can no longer pan or zoom in sculpting mode. Using alt/option or alt/option + control or shift does nothing in sculpt mode although it still works in modeling mode. Bizar. Any ideas how i can fix this? Thanks, appreciate it!