Once a Supplier List has been created, the Super Admin and the Panel Administrators can return to the Supplier List Wizard to edit aspects of the list.
To edit these, select Enterprise Supplier Lists under the Admin Tools menu (either in the top menubar or on the homepage on the left-side menu).
Click on the three vertical dots to the right of the relevant supplier, and then click on the Edit this list option.
You can find information on each step of the Supplier List Wizard here: Creating a Supplier List.
While in the Supplier List Wizard, ensure you save any changes you make by going to the List Complete step and clicking on the Finish button.