The mouse wheel zooms. The bounds of the axis stay fixed on the screen however. It will become more intuitive if you draw a circle to the screen first.

To pan around the space, use the right mouse button. To zoom, use the scroll wheel. To rotate, use Shift+Right mouse button.

Why not play with it a little bit before dismissing it so suddenly? I don't need to mention to a Solidworks/Autodesk user that CAD tools take some patience to understand properly :-)