WordPress add_editor_style() Loading a single css file
Example
Code
function add_new_style() {
add_editor_style( 'file-name-here.css' );
}
add_action( 'admin_init', 'add_new_style' );
Explanation
In the above code, we used add_editor_style to load the css file. We also used add_action to make sure that WordPress runs our function.
