A user has asked if there is a way to convert a secondary entity into a primary entity.
To make an Entity appear as a Primary Entity
The entities that are shown as Primary Entities in the Administration -> Customisation screen have the field bord_primarytable set to 'Y' in the custom_tables metadata table
select bord_primarytable, * from custom_tables
where bord_primarytable is not null
To promote a Secondary table into a primary entity set the value of bord_primarytable to 'Y' for the entity you wish to promote.