I am working on a project that uses Studyo Skin and that I generate output using Frameless Preset.
I have set it to display the breadcrumb and users find it very useful. But when I scroll down the page, it is no more visible. Is there any way to fix it in the header so that it will be always visible?
There's nothing in the skin that I can see. I think the style you want is Topic Page > Center Panel > top-panel, but to figure out if it's possible you'd need to inspect the output code using the browser developer tools, then add the required style and settings to a custom stylesheet which you add to Layout > User Assets.
I did think perhaps you could use a master page (if you're not already using one) and add the breakcrumbs placeholder to the footer, so at least it's also available at the bottom of the page.