# Modifying a Dimension Element and Dimension Text

The modifications covered here can be performed only on dimension elements; they do not work on dimensions that are placed as primitive elements.

The Change Dimension tool is used to change the symbology of a dimension element to the active settings.

The Drop Element tool or the Drop Dimension Element tool is used to convert a dimension element to individual elements.

## Working with Extension Lines

The points that determine what a dimension element is dimensioning can be thought of as the vertices of the dimension element.

A dimension element must have at least two points or vertices, just as a line must have two end points or vertices. Therefore, you cannot delete one of the extension lines of a dimension with only two extension lines.