
At present, SAP Business One has a feature that Referenced Documents will appear on document of the relationship map.
You can now check referenced document field at the end, then the attached document will be displayed with a connecting line of the red dots which visually distinguishes them on relationship maps.

Available in SAP Business One 10.0 FP 2105 an SAP Business One 10.0 FP 2105, version for the SAP HANA