You can delete unit conversion rules from the Unit Conversions Definition dialog box.
- Start ArcCatalog.
- Add the Unit Conversions Definition tool to a toolbar by completing the following steps:
- On the main menu, click Customize > Customize Mode.
The Customize dialog box appears.
- Click the Commands tab.
- Choose Nautical in the Categories list.
- Drag the Unit Conversions Definition button from the Commands list to a toolbar.
- Click Close.
- On the main menu, click Customize > Customize Mode.
- Click the Unit Conversions Definition button .
The Unit Conversions Definition dialog box appears.
- Click a row in the Unit Conversions Definition dialog box.
- Click Delete Conversion.
- Click OK.