Overview of Dimension Styles
The appearance of dimensions like arrowhead style, text location and lateral tolerances are controlled by a dimension style. Using dimension styles (DIMSTYLE), you can specify the format of dimensions quickly and to ensure that dimensions are meet industry or project standards.
Dimensions use the settings of the current dimension style.
Change a setting in a dimension style, all dimensions in a drawing that use a certain style will be updated automatically.
Dimension substyles can be created for specified types of dimensions with some different parameters from the current dimension style.
A dimension style can be overridden temporarily.