“Ctrl+/”
“F11/ESC”
<!DOCTYPE html>
<html>
<head>
<style>
h1
{
rotation-point:50% 50%;
rotation:180deg;
}
</style>
</head>
<body>
<h1>Rotation effect</h1>
<p><b>Note:</b> None of the major browsers support the rotation-point or rotation properties.</p>
</body>
</html>