How to
Header and footer
Header & Footer Builder saves Elementor documents and injects them in place of the theme chrome, with sticky and per-page rules.
Sticky, transparent, and compatibility-method details are in Header & Footer Builder.
What this replaces
The extension injects Elementor documents in place of the theme header/footer. It is not a Header widget you drop on a landing page. Mega Menu, logo, and cart icons go inside that header template.
One header, one footer (usually)
Keep a single site-wide header unless you split by condition (shop vs blog). Two headers matching the same URL is a conditions problem, not a widget problem.
Get King Addons
Free plugin. Elementor required. Pro is optional for extra catalog items and some conditions.