The Manufacturers page lists all the producers of the KNX devices and products which you are using in the KNX Tool.

To manage manufacturers, go to Address Book > Manufacturers. Click + Add Manufacturer in the upper right corner to add a new manufacturer (see picture below) and edit existing manufacturers with the edit button .

The form for adding a new manufacturer has two pages: general information and more information. When adding a new manufacturer you will need to fill in the general information page. The more information page is optional.