Header Search
The header search toggle. Emits the #top-search trigger the theme search dropdown is wired to. It is shown in the block inserter as Canvas Header Search and registered as canvas-core/header-search.
Select the block on a page and its own settings open in the sidebar, in the panels below:
Settings
Each setting is named exactly as the block editor names it, followed by what it does and what it starts as. Where a setting carries a Shown when line, it stays hidden until that condition is met, which is the usual reason a setting looks missing from the sidebar:
Settings
Search IconDefault
uil uil-searchIcon font class for the search trigger (the close icon stays bi-x-lg).
Open StyleDefaultEmpty
Fullscreen overlay expands the search form over the whole viewport (adds the search-overlay body class) instead of inside the header row.
ChoicesHeader Dropdown (default) (empty)Fullscreen Overlay
Related
Every Canvas block also carries the Animation, Scroll Effects and Advanced panels, which are described in Controls every Canvas block has.
Other blocks in Header: App Menu, Header Button, Header Cart, Header Container, Header Icon Link, Header Info.

