Select the dimension line with the Pick tool.
If you want the units displayed next to the value on the dimension line, enable the Show Units For Dimension button on the Property Bar.
Choose a style from the Dimension Style list box on the Property Bar.
You can choose from Decimal, Fractional, U.S. Engineering, or U.S. Architectural style. (This option is not available with Angular Dimension lines.)
4 Choose the precision level from the Dimension Precision list box on the Property Bar.
5 Choose a unit of measurement from the Dimension Units box on the Property Bar.
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