1. Click Home tabAnnotation panelDimension Style. Find
2. In the Dimension Style Manager, select the style from which you want to create a substyle.
   Click New.
3. In the Create New Dimension Style dialog box, select the type of dimension that will
   apply to the substyle from the Use For list. Click Continue.
4. In the New Dimension Style dialog box, select the appropriate tab and make changes
   to define the dimension substyle.
5. Click OK.
6. Click Close to exit the Dimension Style Manager.

Learning AutoCad