On the View menu, point to Orientation, and then choose from these settings:
These options will switch to an orthographic view, where a 2D representation of the building will be drawn with projecting lines orthogonal to the projection plane.
Plan
This setting displays a top-down view of the building.
Front
This setting displays a front-on view of the building.
Back
This setting displays a back view of the building.
Left
This setting displays a left-side view of the building.
Right
This setting displays a right-side view of the building.