Please add auto-numbering of flow items as a functionality.
I would use this to number each major flow item (box) in a workflow to be able to make references to those specific numbers.
Many times it is required that each step in our processes are described in text as well, and here I would make this reference.
Also, for users of your documentation it is often easier for someone not too familiar with business processes if there is a description for each flow item (action) and that they can easily make the connection between the text and flow using the numbers
I know that for instance Visio has this functionality, but we would rather use Gliffy as this is integrated with our Confluence instance.
The workaround today is to write the numbers as the first thing in the text field.