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AutoCAD’s dimensioning tools can automatically measure distances and place dimensions on your drawing. You can simply select objects and let AutoCAD add the appropriate dimensions, or you can tell AutoCAD what type of dimension you want to place and what object or points you wish to dimension. You can access the dimension tools from the Dimensions panel on the Annotate tab of the ribbon shown earlier in Figure 2-29.

You now have some basic dimensions on your drawing. The look and orientation of the dimensions are controlled by the dimension style.

One of the unique aspects of dimensions is their ability to update automatically as the drawing changes. This feature is called associativity, which means that dimensions are associated with the geometry and will automatically update when the geometry changes. In the next section, we’ll look at some ways to modify your drawing and see how the associative dimensions follow along.

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