All Octicons
screen-full
Octicon sizes navigation
React
import {ScreenFullIcon} from '@primer/octicons-react' <ScreenFullIcon size={24} />
Rails
<%= render(Primer::Beta::Octicon.new(:"screen-full", size: :medium)) %>
Jekyll
{% octicon screen-full height:24 %}
Figma
This icon is called screen-full-24
in Primer's Octicons library.