Point objects can be useful, for example, as node or reference points that you can snap to and offset objects from. You can set the style of the point and its size relative to the screen or in absolute units.

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Drawing donuts is a quick way to create filled rings or solid-filled circles. Donuts are actually closed polylines that have width. To create a donut, specify its inside and outside diameters and its center. You can continue creating multiple copies with the same diameter by specifying different centers until you press ENTER to end the command. To create solid-filled circles, specify an inside diameter of 0.

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You can use the SKETCH command to draw freehand sketches. Freehand sketches comprise many line segments. Each line segment can be a separate object or a polyline. You set the minimum length or increment of the segments. Sketching is useful for creating irregular boundaries or for tracing with a digitizer. Small line segments allow for greater accuracy, but they can greatly increase the drawing file size. For this reason, use this tool sparingly.

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Use circumscribed polygons when you want to specify the distance between the center of the polygon and the midpoint of each side. This distance is the radius of the circle the polygon circumscribes.

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If you are drawing on isometric planes to simulate three dimensions, you can use ellipses to represent circles viewed from an oblique angle. First you need to turn on an isometric plane (see “Setting Snap and Grid to Isometric Mode“).

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