Creating a Rectangle

You can create a rectangular open surface made of one face.

See Also
Modifying and Deforming Surfaces Using the Tools Palette
From the Shape Sculpt section of the action bar, click Rectangle .

You can also access this command by pressing ALT+SHIFT+O.

A mesh is aligned along the model axis and the surface is created on the plane parallel to the screen:

The Tools Palette appears and let you modify and edit the surface.