How does the 'section' UI Widget from Palette work?

The only way I can figure out is that you bind some other widgets’ ‘Display’ par to the section widget’s ‘value0’ par. Is that the correct approach? Or is there something more elegant, perhaps using network hierarchy?

If there is documentation somewhere on how to do it, I apologize, I wasn’t able to find it.

Also very curious how this and other UI widgets work, ala tabs, windowHeader, etc…
How do you actually implement these things!?
Cannot find any information anywhere!

-Casey