You draw a beam by clicking the start and end points of its centerline using the Beam tool (). Each beam has six control points. The four additional points are automatically located so that the beam-ends are perpendicular to the sides. You can stretch the corner grip points to define mitered corners.

Note: The Beam tool (), Right Beam tool () & Left Beam tool () share the same button on the Layer Specific toolbar. See "Expanding tool buttons".