SketchUp dimension entities are predetermined lines carrying length information which provide assistance to swiftly and successfully communicate key dimensions of your model. If any changes occur with your model then the dimensions automatically will be moved and updated. There is built-in Dimension Tool with the help of which dimensions are drawn. The link between geometry and dimensions is unidirectional: if you change the value of a SketchUp dimension, the model is not updated. So SketchUp dimensions are only used to retrieve length information from your model.
Rajib Dey
Global Associates
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