Hints For Editing Design
What you can add to the boxes:
I advice you should add about 180x180 px images to the right and left boxes. Bigger images break down your layout's view!
You can add image to the boxes after editing the following code.
<img height="180" width="180" alt="" src="http://IMAGE-URL"/>
Sure, you can add many codes in the boxes. I advice before adding you should check the code whether it works or not. You should not add every code to the design boxes, don't forget the codes may break down your layout view.