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- Start a polyline with two linear segments, then start the third segment like this:
- To end the third segment, first hover over the start point. This displays an auxiliary line extending vertically from that point. You can snap to points along this line.
- Horizontal auxiliary lines can also extend from this point, when the cursor is to the right or left.
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Note: If Always show auxiliary lines is checked in the Drawing Aids window, the auxiliary lines will be displayed, even when you move the cursor away from them.
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