Innovative ways to make a flowchart stand out?

Following my question here, I am wondering what are some innovative ways of making different aspects of a complex flowchart standout.

By aspects, I mean the different processes (as a group) e.g. for an employment flowchart, some processes could be need analysis, advertising, interview, background check, hiring etc.

For each of these processes, there are several steps involved, so they would be illustrated as a group in the flowchart.

The two ways that I currently know are:

• Using colours


• Using different text box borders


• Using different shapes