The eBay settings page, allows you to manage your own eBay account settings and all the vendors’ account settings.
Please note: Although some eBay settings are shared among all accounts, vendor subaccounts use their own settings to list an item at eBay or view eBay listings.
The select vendor form:

At the select vendor form, you can either change the mall settings or select a vendor to view and edit their settings. After a vendor is selected, the settings of the vendor will load and show in below form.