Here is the tutorial I was following for created a fixed Nav Bar.
Around the 20:15 mark it describes in detail.
However, I have my Nav Bar positioned 'relative' --where I want it to be, and I have a Top Bar that shows my social icons and call to action buttons. I want THIS to scroll over the Nav Bar as well as the other sections. I have followed the tutorial and got it to go over blank sections but not the Nav Bar, slider, or rich text sections and columns...I know I'm missing something.
Also, I'd like to note that it only scrolls as described above in the design platform, when I preview...it stays fixed and does not scroll over anything.
*I have turned the fixed Top Bar and the Nav Bar into symbols. Could that be the issue?