If you run a blog with multiple authors, it's often useful to post a specific message to the author of that post on the specific post page. It may include corrections they're required to make, corrections you've made, feedback or more dynamic elements. Usage is via the shortcode of
[note]Message to be displayed in here[/note] inside the actual post content. Colors can obviously be customized.
Copy and paste the WordPress function into your theme's
functions.php file or, if you sensibly have one installed, your custom functions plugin.