Deleting specifications (Aeronautical Solution)
You can remove the specifications from your database as older versions become obsolete.
Steps:
- Start ArcMap.
 - On the main menu, click Customize > Toolbars > Production Cartography.
 - 
Click the Visual Specifications button 
 on the Production Symbology toolbar.
The Visual Specifications dialog box appears.

 - Choose the specification you want to delete in the specifications table.
 - Click Options > Delete Specification.
 - 
Click OK.
Tip:You can also delete specifications by right-clicking in the specifications table.
 
12/22/2014