In the Velux theme
functions.php there is this:
if ( is_front_page() && is_active_sidebar( 'hero' ) )
Which apparently means the Hero widget only functions on the home page. I used that widget to add custom HTML that needs to be in the header on all pages.
I tried the following mod to
functions.php and cleared the cache, but cannot see the custom HTML on other site pages. Site is not yet public.
if ( is_page() && is_active_sidebar( 'hero' ) )