Autodesk 00308-011408-9F30A User Guide - Page 289

To create a duplicate polyline or polygon that is offset a specific distance 1 On the Draw menu, click Duplicate, Offset, or click the Offset button on the All-In-One toolbar. 2 (optional) Enter a new value in the Offset Distance text box on the edit bar and press ENTER. 3 (optional) Press CTRL to duplicate a single segment. 4 Position the pointer on, and slightly toward the side where you want AutoSketch to create the new entity and click. Notice that a rubber-band entity follows the pointer. Mirroring an Entity AutoSketch provides two methods of creating a mirror image of the selection set. You can mirror by dragging one of the middle selection handles across the selection set, or you can use the Mirror tool. Either method can reduce your drawing time by half when you're drawing something that is symmetrical. With mirroring, you need only create half of the symmetrical drawing and then use a mirroring procedure to create the other half. If you need another copy of an existing entity in your drawing, pressing CTRL while mirroring an entity specifies that AutoSketch leaves the original entity behind and mirrors a copy of the selection set to the new location. NOTE Some entities, such as text and OLE objects, cannot be mirrored. To mirror entities using selection handles 1 Select the entity or entities to mirror. 2 (optional) Press and hold CTRL to mirror a copy of the selection set and leave the original. Mirroring an Entity | 279