Panel Notes are used to organize other notes. These containers may be moved liked other notes and given caption et cetera. They are useful for grouping similar notes (say all revision documentation in one panel, with all content in another).
This now shows it after we have moved the two outside notes in.
To move a note users select the PROPERTY MENU and choose the appropriate folder option.
Each panel is actually a layout, with all of the properties that a layout has (ability to add notes, fill in the tab menu