In most cases, the Rectangle tool edges will subdivide a face. In general, the rectangle edges are used to help define the outline of the surfaces that are being subdivided from the original face, using edges to help further “sculpt” the face to the desired form.
Support Sites Here are some helpful online resources if you get stuck: 33The official SketchUp website (www.sketchup.com) contains a community forum. This is a great place to ask questions. 33Many advanced users live on the SketchUcation forums (www.sketchucation.com). This must-visit website is an excellent resource to get help, download custom Ruby Scripts, and learn about current SketchUp trends.
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Part 1: Introduction to SketchUp