Attribute Index
To create Attribute index go to System / Search Management / Search Indexes / Add New / Attribute index
Additional to the general options, you should also select the attribute for search.
Extension will search by options of this attribute and return option name with a link to advanced search page by this attribute/option.
Tip
You can select only attribute that is available for advanced search. You can set this flag on the attribute edit page in admin.Learn more about setting up other indexes in our extension: