Hi @stefanguy,
First, I want to clarify a couple of things, Fixed Top is when you want the menu to be sticky, Static Top is when you want the menu to remain at the top of the page. Second, unfortunately, One Page Navigation is not designed to be a Static Top.
Yes, it’s easy to make the One Page Navigation a Static top with a custom CSS
header .x-navbar-fixed-top {
position: relative;
}
But that will cause a bigger issue (unless you can tolerate it), with that custom CSS the One Page Navigation will not snap on the intended section (Try it so you’ll see what I mean).
So here’s my advice, first, please remove the JS provided above from your Theme Options > JS to avoid any conflicts. Then unset your One Page Menu from the page, yes deactivate the One Page Navigation on the page.
Here’s how to resolve this, first, please download and install this plugin (Menu Swapper). After it installs and activates, navigate to Settings > Menu Swapper create a new Theme Location.
You can name it that way, or any names you like.
Then navigate to Appearance > Menus > Manages Locations, and assign your One Page Menu to the your new Theme Location.
Now the last step is to assign this new Theme Location to your page that needs the One Page Navigation, to do that open/edit the page, under Settings see Menu Swapper tab, replace the Primary Menu with One Page Navigation
Hope it helps,
Cheers!