Thank you for your reply. Yeah I know my message is confusing!
Basically right now I have my menu at the top of the page, on white background, and only after that a hero image. I would like to know if there’s a way to make them both overlap and start at the same position (very top of the page), rather than the menu first and then the image.
In other words, does a sticky menu have to have an initial space allocated to it at the top of a page before overlapping content on scroll, or can it overlap content from the very beginning?
The problem with setting a negative margin to my content is that it creates a jitter effect on loading.