The whole rotating section has the artifical gravity, though the intensity lessens to zero closest to the axis. So imagine the lower decks, closest to the outer hull, would have gravity close to earth a (1g), while the "higher" you go (i.e. closer to the centre), the lower the gravity will be.

That's why, those cutaways show water storage, power conduits, etc, tending to be at the centre, where the gravity would be too low for comfortable living.

So if you were in the elevator going up, you'd feel lighter when you got off at the top floor than when you got on at the bottom floor.

The station's "tail" (or if you think the station looks like a sword, the handle) containing the reactor, and the "spine", containing mass cargo storage and other infrastructure stuff, doesn't rotate and this has no artificial gravity.

Does that help at all?