In Reporting and Analytics, click the side navigation menu, click Configuration, click Warehouse Admin, click Miscellaneous, and then click Master Groups.
Select a master group, and then click Assign
Store Master.
Click Add, and then select a Location from the drop-down list.
Select the item types or groups to designate the master
items. You cannot designate an item type or group as a master item
if it has been set for another master store in the same master group.
Select Menu Item, Major Group, and Family Group together.
You can select Assign as location if you deactivate the location as a master store.