.Map :: MoHAA Mapping

Hey, when I try to view my map (on the right of moh radiant) it goes crazy. The view bar starts spinning in circle and I can't control it. I can't ever find what I'm working on and it's a huge problem. Does anybody know how to reajust it?

HOW DO I MAKE WALLS I NEED HELP?

thank you

then how do i move it up and down

How do i move the textures in the box i mean that small box on the bottom right corner :?:

I need help finding a tut. Does anyone no a good one