You can control the appearance of dimensions by changing settings. For convenience and to help maintain dimensioning standards, you can store these settings in dimension styles.
You can view all the settings in a dimension style. Dimension styles used in externally referenced drawings are differentiated from those defined in your current drawing.
You can control the appearance of dimension lines, extension lines, arrowheads, and center marks.
You can control the placement of dimension text, arrowheads, and leader lines relative to the dimension and extension lines.
The numeric values displayed in dimensions can appear in several formats. You can also control how numeric distances are represented.