The navhead layout has a full-width horizontal navbar at the top and a near full-width toolbar at the bottom of the page. It differs from the other full-width layouts because the navbar remains visible when the page is scrolled.
This is what the Chameleon skin looks like when using the navhead layout.
Result
Code
<structure xmlns="https://ProfessionalWiki.github.io/chameleon/schema/3.5/layout.rng">
<component type="NavbarHorizontal">
<component type="Logo" position="head"/>
<component type="NavMenu" flatten="navigation" />
<component type="Menu" message="secondary-menu"/>
<component type="PageTools" class="flex-row" position="right" hideSelectedNameSpace="yes"/>
<component type="SearchBar" class="order-first order-cmln-0" position="right" buttons="go"/>
<component type="PersonalTools" position="right"/>
</component>
<grid class="flex-fill">
<row>
<cell>
<component type="SiteNotice"/>
</cell>
</row>
<row>
<cell>
<component type="MainContent"/>
</cell>
</row>
</grid>
<grid class="mb-2 mt-4" mode="fluid">
<row>
<cell>
<component type="NavbarHorizontal" collapsible="no" class="small mb-2" >
<component type="Toolbox" flatten="no" class="dropup"/>
<component type="LangLinks" flatten="no" class="dropup"/>
</component>
</cell>
</row>
<row>
<cell>
<component type="FooterInfo"/>
<component type="FooterPlaces"/>
</cell>
<cell>
<component type="FooterIcons" class="justify-content-end"/>
</cell>
</row>
</grid>
</structure>