1. Show handles on background image
If you want to show the handles for changing background image you have to add the style inline
2. Load modal with content
You can show modal with content by clicking of element.
You have to set an attribute "data-mw-dialog" of the element you want to click:
data-mw-dialog="image.jpg" //Path to image data-mw-dialog="http://google.com" //URL to website data-mw-dialog="#some-element" //ID of element
3. Cloneable elements
For creating a cloneable elements, just set them a "cloneable" class.
<div class="cloneable">This block is cloneable</div>