I was trying to dig into this deeper, but I couldn't find any useful ways/hooks to add a little disclaimer above the Additional CSS code editor in the Wordpress Customizer. If anyone has a starting point of how i can add something simple like that, it would be greatly appreciated.

The section I am talking about is wp-admin > Appearance > Customize > Additonal CSS

We basically want to add a disclaimer to our clients about using that section, and I wanted to do it the Wordpress way, and not hack anything using jQuery (to add it) or in core.

2 Answers 2


Yep. I was able to show it by default using:

add_action('customize_controls_print_styles', function()  {
    <style id="custom-css">
        #sub-accordion-section-custom_css .description {
            display: block !important;

Thanks for your help!


You will need the get_section method of the $wp_customizer class. Like this:

add_action( 'customize_register', 'wpse261932_change_css_title', 15 );

function wpse261932_change_css_title () {
  global $wp_customize;
  $wp_customize->get_section('custom_css')->title = __('Additional CSS. Be careful!', 'textdomain');

For some reason the description has display:none on it in this panel, even though that would be a more logical place to show your disclaimer.

  • Ah... Good call @cjbj. The description would definitely be better, and from the looks of it, you can show the description by clicking on the question mark button, and it will drop down. Now I wonder if I could hook into the javascript that controls that whole feature, and after some even is triggered, trigger a click on the question mark to drop it down. Or, maybe i could do something with CSS.
    – Aaron Olin
    Commented Mar 31, 2017 at 20:34
  • You could queue a css file for the customizer to have the description shown by default
    – cjbj
    Commented Mar 31, 2017 at 21:38

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