How to add CSS code to admin dashboard via Child Theme e.g. modify this H1
Please add this function below to your Vehica Child Theme functions.php file. You can insert there also your own custom CSS code (example code will change h1 (main heading) font size to 100px):
function admin_style() {echo '
<style>
h1 {
font-size:100px!important;
}
</style>
';
}
add_action( 'admin_head', 'admin_style' );
final effect: