N00b help with slider

When I insert some pages with photos in it looks like this:

http://i.imgur.com/uAR6zKH.png also I have to click “read more” to see the photos in the posts?

What do I have to do to get it like the normal slider as showed in the preview of the theme?

@peetdk

Images inside posts content are different from ones that are displayed above post content and inside slider. These images are called featured images and you can read more about them here.

Let me know if this helps.