ViewDisplayViewportsThree Viewports

The Three Viewports command changes the display so that the program shows the modeldrawing in three viewports, with the display oriented so that the model is viewed from the top (looking down along the Z-axis perpendicular to the XY-plane of the World Reference System) in the top-left viewport, from the front in the bottom-left viewport, and from a left front isometric position in the right-hand viewport.

For example, if your modeldrawing appears as shown in the following illustration,

the Three Viewports command would change the display and reorient the modeldrawing so that it would appear as shown below.