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I would like to draw polygons for an indoor map test and would like to draw perfect rectangles (horiz. and vertical edges). How to set QGIS options on polygon edit /draw to do that ? thank you for your attention. best regards, JM Portugal

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There is a CadTools Plugin. AFIK it is only suitable tool for this task at the moment.

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Hope that I got your question right..The plugin "rectangles ovals digitizig tools" lets you draw perfect polygons. Just set the vector layer on edit and and draw them.

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