Hi there,
today the best we can offer is to use some CSS, it won’t have any fancy transition but it will make it sticky.
1. Edit your Block element, select the Container Block.
1.1 under layout change the Tag Name to Header ( its not required for the sticky but just means the HTML is semantically correct for your custom header ).
1.2 in Advanced > Additional CSS Class(es) add: sticky-header
1.3 Add this CSS to your site:
.sticky-header {
position: -webkit-sticky;
position: sticky;
top: 0;
z-index: 1000;
}
You may want to consider giving the Container Block a background color, as its currently transparent…