Hi,
As far as I know, the controls are basically the same as when viewing a 3D scene.
Alt + middle mouse button + drag to look around.
Shift + mouse wheel to rotate the viewpoint vertically at regular intervals.
Left and middle mouse button + drag left or right to zoom in or out.
Ctrl + mouse wheel to zoom in or out at a constant magnification.
Ctrl + 1 to reset viewpoint to the right.
I don't know if it's a software specification or a bug that Ctrl + 1 doesn't face forward, or if there's some other way to reset viewpoint to the front.