We did a lot of enhancements in the visual editor in the new JDeveloper 11g 126.96.36.199. I recorded this short 3 minute demo to show you a couple of the things that are a bit hidden, but can be useful to know.
The demo shows:
Changing screen resolution for easier editing
Setting binding display options
A hidden convert option that you get with right mouse drag from the component palette.
Check it out: