<!DOCTYPE html>
<html lang="es">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width">
<title>
Posicionamiento fixed
</title>
<style>
span {
position: fixed;
top: 0;
right: 0;
background-color: yellow;
}
</style>
</head>
<body>
<h1>
Posicionamiento
<span>fixed</span>
</h1>
</body>
</html>