To Control the Display of Extension Lines

1. Click Drafting tab > Dimension panel > Dimension Style.
2. In the Dimension Style Manager, select the style you want to change. Click Options Modify.
3. In the Dimension Style Manager, select the style you want to change. Click Modify.
4. In the Modify Dimension Style dialog box, Lines tab, under Extension Lines, change the settings as needed.
5. Click OK.
6. Click Close to exit the Dimension Style Manager.