Try the following -
Load Z-Brush, choose the Super Normal Man mesh.
Enable perspective in the “Draw” palette (focal length 70).
Navigate in to the head.
Set the rotation method to “Local” and click somewhere on the cheeks to give it a local point around the head to rotate around.
Problem number 1-
Zoom as close as you can just using the alt+mouse then let go of alt button method. It only allows you to dolly in so far, then it stops, 3.0 did not have this problem, you could really scale in far and when it got really close it would start szooming the canvas to allow you to go further.
Problem number 2-
While zoomed, now try to rotate so that you can see under the chin. Again here ZBrush locks the navigation, it’s only possible to rotate above the head, but not possible to really look beneath the chin when fully zoomed in!
Turning off “Local” or turning off “Perspective” fixes the rotation issue, however it should work with local on and perspective on in the first place.
The issue with rotation having problems when there’s mesh that comes in substantially front of the “local” area is quite a big one. The Zooming one even more of a pain, please bring back the nice method in 3.0 where there wasn’t this limit in place that left zoomed out very far from the mesh (especially when you’re trying to detail things).