The Region Command

Toolbar	Draw
Pull-down	DrawRegion
Keyboard	REGION	short-cut	REG

A region is a surface created from objects that form a closed shape, known as a loop. The Region command is used to transform objects into regions rather than actually drawing them (i.e. you will need to draw the closed shape or loop first). Once a region is created, there may be little visual difference to the drawing. However, if you set the shade mode to "Flat Shaded", ViewShadeFlat Shaded, you will see that the region is, in fact, a surface and not simply an outline. Regions are particularly useful in 3D modeling because they can be extruded.

Before starting the Region command, draw a closed shape such as a rectangle, circle or any closed polyline or spline.

Command Sequence

Command: REGION
Select objects: (Pick P1)
Select objects:
1 loop extracted.
1 Region created.

You can use the boolean commands, Union, Subtract and Intersect to create complex regions.