A Rectangular Floor lets you add a box-shaped area in the current floor hatch style in Perspective view.
To add a Rectangular Floor
1 On the Perspectives toolbar click Rectangular Floor
The prompt reads "First Corner"
2 Click the first point for the floor.
The prompt reads "Second corner or enter length"
3 Click a point to define the direction and angle of the first edge, or type a distance then press ENTER.
The prompt reads "Third corner or enter length [square]:"
4 Click the final point for the room. Alternatively, type a distance then press ENTER; or right click to accept the default value – a square room.
Distances: All distances entered in the command are isometric.
Note: If the current Perspective Setting has the Align to First Edge for floor hatching selected, the hatch style will align to the first two points you select.