Custom CSS class

Hi,

You can add custom classes to a custom field in the Advanced tab, option Custom CSS class, and separate them by space. Screenshot https://monosnap.com/file/JiGv0NOrapjy2NgOXHsnFCml6nZGAa

Hi,

The classes are used to style the custom fields in the backend or the frontend form in the frontend. If you want to style the field value on the frontend, please add the HTML tags with classes to style them. Or contact Oxygen support to ask for help with this case.

Hi,

You can use add this code to the file functions.php in the theme/child theme folder to apply the custom CSS code in the admin area

add_action('admin_head', 'my_custom_css');

function my_custom_css() {
  echo '<style>
    .test-class-1 {
      background-color: red;
    } 
  </style>';
}

or use the plugin https://wordpress.org/plugins/admin-css-mu/ to apply the CSS code.