So yeah..
Why is this wall so big? D: (http://home.comcast.net/~legoh/thick_wall.JPG)

Click on that link. I can't figure out how to make that wall less thick. The next one down is almost nothing. It's about | | that thick. I don't know if that's how it's supposed to be and if it is I'll feel like a boob.

If you hold down ctrl and scroll your mouse upwards you should be able to zoom in on the top right pane and make the wall smaller.

Also if you press "[" on the keyboard you should be able to shrink the grid down so it snaps to a smaller rule.

I can't see what you have your grid set to, but set it on 16 by pressing [ or ] when making walls. Makes life so much easier.

Also, you can drag the Texture box, Vis Groups box, and Select box on the right and put them all in on column so you have more room for the view screens.