Navigation

Now. Once you click on your ZSphere tool, and left-mouse click / drag on your working area something like this should pop up. (Holding SHIFT while click-dragging will snap or align the sphere)

Once you do so alot more options will pop up, but for now lets see how can we navigate the screen.
Now that you have your sphere in place, In order to see it from all the angles you got to make sure EDIT mode is turned on (if not you'll just keep adding more spheres on the 2D canvas)

Now that your in EDIT mode you can
ROTATE around the Sphere just by Left/Right-clicking anywhere on the empty canvas and dragging your mouse.
MOVING sideways and up/down is achieved by pressing ALT+Left/Right-Click and dragging.
ZOOMING in and out is a bit annoying due to the fact you have to press ALT+Left/Right-Click and then releasing ALT and moving the mouse just by holding Left/Right-Click. Thats the hardest bit to getting use to.

When it comes to fine details and precision I tend to use the options listed on the right Tool side;

 Just by click-dragging them you can adjust your point of view.