Camera Controls
The camera is rotated with Left Click and Dragging.
The camera is panned with Right Click and Dragging
On the top right of the scene is a view cube

Clicking an axis of the view cube will transition you into orthographic mode. This is useful for getting a proper view of the dimensions.
If clicking on one of the corners, it will put you in isometric view with the angle corresponding to the corner.
Double clicking anywhere or the white part of the cube while in the orthographic view will return you back to perspective view.