The Documents tab of the Order Details screen presents a list of documents linked to the Operation that has been selected from the Filter by operation menu.
On this tab, you can preview a specific document in the Documents list.
Only TXT, PDF, JPEG, GIF, and PNG files can be displayed. All other document files can only be downloaded.
Some common file types (e.g., DOCX, JPG, PNG, PPT, TXT) have representative icons in the Documents list.
For more information on linking documents to Operations, refer to the Link Document Wizard topic in the Process Builder Help.