To Sketch an Offset Edge
After you sketch an offset edge, you can move it by dragging it in the sketch window.
1. Click Sketch > Offset. The Type dialog box opens.
2. Select an edge type.
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When offsetting tangent edges, use the Chain option.
To use the entire edge to create an offset entity, you must create an untrimmed offset edge from a single edge.
3. Select one or more appropriate entities or edges to offset.
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For the Chain option, use the CHOOSE menu to change selections.
4. To offset the edge in the direction of the arrow, type a positive value. To offset the edge in the opposite direction, type a negative value.
5. Press ENTER or click . An offset entity is created.