hi there
On image 1, I can see that Header is overlapping the section , at the same time, I can not understand: how you can achieve the overlapping multiple sections without pinning the header at the same time? If we are talking about one section only, we can work with the background image for the section and use negative docking for it in size of the header , so it will give us overlapping effect, without pinning the header, but how you see the second section overlapping, do you have any reference or video?