There are two ways to do this.
1. Duplicate the main or first slide numerous times - as many as you'll need for the show, which looks like 6 including the first "overview slide".
2. You know have two choices - either use the Magic Move transition between the first slide and the next, which has the main box centre screen and enlarged proportionally.
3. Or enlarge the slides so that the main point is central, but use hyperlinks to move between the slides. This also gives you the liberty of changing the order spontaneously should the situation demand. Using the main first slide, place an invisible box around each element and use a link to move to that slide which is enlarged. Then you have to decide if you will come back each time to slide 1 (the overview) by having the whole slide hyperlinked to slide 1, or the whole slide linked to the next slide. That way you don't have to go looking for the hyperlink area.
The Magic Move effect will give your presentation a "Prezi" like effect, while the hyperlinked version I've described will just use gentle dissolves between each slide.
I will sometimes use 3 because I want to encourage audience participation and let them choose where to go next... e.g., the various elements of a 747 wing assembly, or the interior of a large cruise ship, showing state rooms, dining, pool area, ballroom, etc.
Les
