In the left panel of a contact in CRM, there the "associate list" (name could be different in english) with a number in a bullet which represent the number of element in it.

In my screenshot, we can see most are empty except "dossier repreneur". 

Great feature, we can see rapidly which section has something in it, and on top of it, when we scroll over, there a + sign to add an element.

How can I do this in Canvas?

 

thanks