“Ctrl+/”
“F11/ESC”
<!DOCTYPE html>
<html>
<body>
<svg xmlns="https://www.w3.org/2000/svg" version="1.1">
<rect x="50" y="20" width="150" height="150" style="fill:blue;stroke:pink;stroke-width:5;fill-opacity:0.1;stroke-opacity:0.9" />
</svg>
</body>
</html>