[Visualpython-users] movement in 3D and visibility in gdisplay

Hello!
Could somebody tell about two things - movement  in (2D)3D and enabling visibility in gdisplay?
I need some more flexibility with 2D-graph:
I want to zoom and move some interesting details in my (2D)3D graph. Is it possible?
The other thing I want to know:
Does visibility work with objects graphed on gdisplay?
Thank in advance.