Quote:

It looks like there is a button that needs to be pushed in. I also see a hole, but don't know what it is for.

I guess I'll be doing some experimenting



Stock shocks, right? No button. See that zig-zag line against your "button"? Just stick the biggest allen wrench in the hole and rotate the shock to the next notch. Usually first two for solo riding, firmest two for two-up.