godot/scene/theme/icons/zoom_more.svg

<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16"><circle cx="8" cy="8" r="8" fill="#b2b2b2" fill-opacity=".65"/><circle cx="8" cy="8" r="7" fill="#fefffe"/><path fill="#010001" d="M7 4h2v3h3v2H9v3H7V9H4V7h3z"/></svg>