Linking Documents to R/3 Objects 
Prerequisites
In Customizing for the Document Management System, at least one R/3 object (for example, material master record) is defined for links to the document type.
Procedure
You now see a tab page with linked objects. The tab pages for the objects are dynamically determined based on the settings of the document type.
For example, when object links are set for the document type DRW objects material, change number and customer a tab page appears for each of these objects.

The short text for the object is displayed if no object allocation exists. As soon as one object link exists the short text is enhanced with the addition of the
icon (Links exist).
For a document info record, for example, you enter the document number, document type, document part, and document version. For a material, you enter the material number.
The system checks whether the object exists and displays the description from the object master.
Result
When you save the document info record, the object link is saved. When at least one object link exists is indicated with the
(Links exist) icon.