When in a Product record, click on the
Tab in order to view or edit the managing entities information for this product.

This area helps to track the Managing Entities which have access to sell this product and their commissions.
To add a managing entity click on the add button
a blank like under the heading columns will appear and you can fill in the necessary details. To remove a Managing Entity tick the selection box
and click remove
.
Click
to Save all data.