docuseal/app/views/personalization_settings/_email_body_field.html.erb

<div class="form-control">
  <%= ff.label :body, t('body'), class: 'label' %>
  <% variables = AccountConfig::DEFAULT_VALUES[local_assigns[:config].key].call['body'].scan(/\{([^}]+)\}/).flatten.uniq %>
  <%= render 'personalization_settings/markdown_editor', name: ff.field_name(:body), value: local_assigns[:config].value['body'], variables: variables %>
</div>