I try to customize fieldset ABC that are inside drupal commerce checkout page. Markup looks like this
<fieldset> <legend>ABC</legend> <div class="fieldset-wrapper"> <div class="form-item"></div> <div class="form-item"></div> </div> </fieldset>
I would like to put some additional code directly inside fieldset and then also some other html directly inside form-item elements. Question> What should I do to achieve that? I found this page https://api.drupal.org/api/drupal/includes!form.inc/function/theme_fieldset/7 would it be of any help? Thank you.