Adding Related Records
You can add new related records to a product-level relationship as described in this section.
To add one or more related records to a relationship:
1. If necessary, click on the tab for the relationship to which you want to add related records to make it the active tab.
2. Make sure the current table is the table that contains the records you want to add.
3. In the Records pane, select the records that you want to relate to the anchor record, either as:
¡ siblings of a sibling anchor
¡ children of a parent anchor
¡ parents of a child anchor.
4. Choose Relationships ® Add to Relationship from the main menu, or drag-and-drop the records into the applicable sibling grid or non-anchor parent/child grid.
MDM adds the related records.

When you add new records to a child grid that has a Position: (1) the Add to Relationship menu command adds them as the last related records; and (2) drag-and-drop adds them into the position at which you drop them.
Required and Quantity, if they are defined for the relationship, are assigned default values when you first add the related records (Required=No and Quantity=1). To change the default values, you can: (1) click on the Required checkbox to toggle whether or not the record is required; and (2) click on the Quantity cell and type a new value.
You can also drag-and-drop records from the Records pane directly into the anchor parent/child grid if a single record is selected in the non-anchor grid.