Adrenalin uses Advanced Custom Fields to manage Page Settings. If you import the demo data for the theme you will obtain these fields automatically.

If you choose to setup Adrenalin without the demo data you can import the Page Settings fields by importing the Page Settings XML.

To import this file, go to

Tools -> Import -> WordPress. (Install the Importer plugin if prompted)

Select pagesettings.xml (attached)

You should then see page settings as follows