Selector
This plugin allows you to edit and assign ID or CSS class to block tags.
Click on a block then choose the dièse (#) icon on the toolbar to open the Selector popup and edit ID or class of the block.
Code
<!DOCTYPE html>
<html>
<head>
<title>Redactor X</title>
<meta charset="utf-8">
<!-- css -->
<link rel="stylesheet" href="/your-folder/redactorx.css" />
</head>
<body>
<!-- element -->
<textarea id="entry">...</textarea>
<!-- js -->
<script src="/your-folder/redactorx.js"></script>
<script src="/your-folder/plugins/selector.js"></script>
<!-- call -->
<script>
RedactorX('#entry', {
plugins: ['selector']
});
</script>
</body>
</html>