To set the default units for a drawing

1. On the Tools menu, click Options. The Options dialog box appears.

2. Click the Rulers tab.

3. Click the Units button for the ruler you want to change. The units menu appears.

4. Click the units you want, or click More Units to choose from the Available Units dialog box.

The selected units setting becomes the default units setting for the current drawing.

The default units setting is marked with an asterisk (*) in the Available Units dialog box.