Add & Edit Manufacturer

go to the section Catalog → Manufacturers

Manufacturer Name: The manufacturer (brand) name as it will appear in the front-end.

Also, you can fill/edit/select the following fields:

Stores: Select the store where Manufacturer will appear on the storefront

SEO Keyword: The Search Engine Friendly URL Identifier. Work when SEO URL's enabled.

After you have made your changes, select the SAVE button.

Then page will reload and you will be able to add Image or any Media using Resource Library. This can be used to display a copy of the manufacturer's brand logo on the manufacturer page and product assigned to this brand.

To modify custom Layout for manufacturer go to Layout Tab.

Layout: Select a layout override to change the look and feel of this manufacturer page.