You can adjust the length of the dimension extension lines in dimension properties in an open drawing. You can also adjust the extension line length using advanced options.

1. Open a drawing and double-click a dimension.
2. Go to the General tab in dimension properties.
3. Select an option from the Short extension line list:

   Options	Description
   No
   Yes	Use this option to create extension lines all of the same length:
   On grid lines only	Use this option to use the short extension line automatically if a dimension line falls on a grid line. Elsewhere the extension line will be as usual.

4. Save your setting in a properties file for later use.
5. Click Modify.
6. To adjust the extension line lengths, go to File > Settings > Advanced options > Dimensioning - general and set the following advanced options. These advanced options adjust the extension line length in relation to the text size: