In ePublisher Designer's Document Manager, to disable the automatic generation of Preview tabs each time a document is added, do the following:
- Open the Preferences dialog using menu: Edit > Preferences. 
- Uncheck Automatically display preview for newly imported documents. 
- Select OK 
In addition, you can disable generation of Preview tabs when double-clicking documents in the Document Manager by also unchecking:
Display preview on document double-click
 Last modified date: 10/21/2021