View document in material master, Basic data 2 screen?

Hello gurus,

How to view a DIR assigned to material master - basic data 2?

According to help.sap.com:

Additional Function for Material Master Record:

In Customizing for the Material Master, you can define a standard document type by choosing Make Global Settings.

- Done this: assigned document type needed, created a DIR with that type and assigned it to a given material

Documents of this standard document type are displayed in the material master record, in the Basic data 2 view (Extras ® Document data).

- Information of the DIR can be seen in the main screen, no path Extras --> Document data (I know DIRs are shown behind menu path Additional data --> Documents)

You can display the original application files of a document (for example, an engineering/design drawing) directly from the object (for example, material) using a display application (viewer).

PROBLEM starts here: no icon or button to click in order to view the document although the help states so.

Any idea what should be done? Should I install a software of some sort to view? Assign it somehow with SAP? The document type here is doc (MS Word), so nothing special.

Any advice is highly appreciated.

BR,

Pipsa