To Change the Precision of Dimensions (AutoCAD Mechanical Toolset)

1. In the drawing area, select the dimensions you want to edit. The Power Dimensioning Ribbon Contextual Tab displays.
2. To change the precision of primary units, specify the number of decimals to round off to, in the box adjacent to Power Dimensioning tabDim Text panelPrimary Precision Find
3. To change the precision of alternate units, specify the number of decimals to round off to, in the box adjacent to Power Dimensioning tabDim Text panelAlternate Precision Find
4. In the adjacent box, specify the number of decimal points to round off to.
5. Press ESC.