This example shows how to change items in format popup. See the format setting description for more details.
<!DOCTYPE html>
<html>
<head>
<title>Redactor X</title>
<meta charset="utf-8">
<!-- css -->
<link rel="stylesheet" href="/your-dist-path/redactorx.min.css" />
</head>
<body>
<!-- element -->
<textarea id="entry">...</textarea>
<!-- js -->
<script src="/your-dist-path/redactorx.min.js"></script>
<!-- call -->
<script>
RedactorX('#entry', {
format: ['p', 'h1', 'h2', 'h3', 'h4', 'ul', 'ol', 'address']
});
</script>
</body>
</html>