You can assign different colours to your content in your pages using the categories. We start you off with two default categories, but you can remove them or add more and change their colours by clicking on them.
As you add more content to your pages, we will keep a running total of the content you have assigned to a particular category, and also a percentage of the total.
You can display your current category stats on your flatplan. This way you get to see a running total on how many fragments have been assigned a category. Take a look in the View Options menu.