To Set the Overall Dimension Scale

Do one of the following:
- Click Home tabAnnotation panel (expanded)Dimension Style. Find
- Click Annotate tabDimensions panelDimension Style.
In the Dimension Style Manager, Styles list, select the style you want to change.
Click Modify.
In Modify Dimension Style dialog box, Fit tab, under Scale for Dimension Features:
- Choose the Use Overall Scale Of option.
- Enter a value for the overall scale.
Click OK.
Click Close to exit the Dimension Style Manager.