hi @Make, I checked that site, but the floating nav bar is showing properly for me. Do you have a screenshot of the exact thing not working?
Regarding changing the styles of the nav bars, those are symbols, to edit those, you double click on the symbol which is highlighted in green (say the Nav Scroll symbol). This will open to allow you to start editing. Sometimes, those root elements have display none in effect, you have to temporarily set the display to block to view the element for editing. When done editing, set that back to display none.
I hope that helps, if not, let me know and I am happy to further assist. Cheers, Dave