That is a feature that we have in our TODO list but we don't have an ETA for it yet.
This can be changed with custom coding of course.
Sadly, custom coding is out of the scope of our support service, but, as a hint, I can suggest you use this filter to display whatever you want:
apply_filters( 'atum/list_table/column_locations', $locations, $item, $this->list_item, $this )
This is located on
/wp-content/plugins/atum-stock-manager-for-woocommerce/classes/Components/AtumListTables/AtumListTable.php line 1246.
I hope this helps.