[Theme: Autofocus] Different pictures on posts and front page?

Hi there,

I’m currently working on my first website in wordpress and everything has been going fairly smooth up until now. I am using the Autofocus theme and its working like intended; I upload photos to my post and they display on my front page. However I would like to have different images, or at least different sizes, displayed on my post page. The theme seems to be using just the first image you upload, the second is nowhere to be found.

Thanks in advance!