I'm creating some custom fields for my categories, so I've added a couple of simple text fields in the database with the setup php script, then extended the
category_form.xml to show my fields in the admin category page. Everything works fine: I see the fields in the admin category page and I can save the values.
I'd like to add a line of comments under those fields. I thought I could just use the
comment tag like I do in every other xml form but here I get the error "Element 'comment' is not expected".
Is there a way to add a comment-like sentence under the field?