Magazine Homepage isn t in Page Atrribute

Hello,
i d like your theme, its very usefull and very simple..As i live previewed i saw message on slider tab , for make a page magazine homepage.. I downloaded the theme , i used all of the feauters and at the point of slider , i follow every steps of urs as u link at ur official page, and i didn t find any Magazine Homepage..
Anyone knows how to fix it ?
We want to use that theme…

Thank you all