- Draw straight lines freely on the drawing by your mouse.
- Input a certain length if you would like to.
- Press shift to turn on/off the quadrature function to draw horizontal and vertical lines.
Tips: The line drawn can intersect with existed lines of the drawing. What’s more, it can be captured in subsequent measurements.
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![](//inter-f.kuaicad.com/ask/user_uploaded/article_imgs/6696318623311462644/20210129174726494-669.png)