The Four Unintuitive, Critical Things to Learn About SketchUp
1. It Really Wants To Be ModalDon’t click and drag1
This common idiom used everywhere else does not work well in SketchUp
Once you are in a mode (by selecting a tool and clicking on a starting point once), you can rotate and pan the view (camera) to find and select the points you want to synchronize with your clicked-point, or enter enter a numeric length. Then, exit the mode by clicking once or pressing Enter for the number. Holding the left mouse button makes it harder and prevents some nice features (see Control the Axes below)
2. Use the Tape Measure and Guide-Lines Constantly
Guide-lines allow you to do what you want without fighting the model. If you want to show a dimension and you cannot find the points to connect, draw a guide exactly where you want (e.g. specify a length) and use the endpoints of the guide for your dimension2
When resizing or moving to achieve...
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