Are you trying to learn website creation with divi?

If so, here are some useful distinctions between the three types of boxes which you can add and edit.

 – Black Boxes are modules, they display the actual content of the page such as images, text, videos ect…

 – Blue boxes designate sections of the page, which house all your content and rows.

– Green boxes are rows, they determine the formatting of the page.

– Purple boxes outline an entire page itself so make sure all of you content is spaced correctly on the right page.

I hope this knowledge helps you in your efforts!