To Link a Main Document to an Item

 
A Main Document for an Item is a document that defines the item, like a model or a drawing.
 

To link a Main Document to an Existing Item

 
- Mark an Item and select Link - Main Document from the right click menu
 
 
A search dialog is opened
 
 
- Fill in a search criteria
 
- Click Update Search to activate the search.
 
- Select a document from the search result and click OK.
 
The selected document is now linked to the Item as a Main Document.