The measure tool allows you to get the precise dimension of parts of your prints, or, more generally, the distance separating two points or faces. To use the measure tool, simply click on the first end point of the space to measure, then click on the second one. The measured distance will display in the properties panel on the right side of the scene.
Note that once an object is measured, you can alter its scale by using the dimensions box. The object will be proportionally scaled in all dimensions.
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