Dexterity CTs don't display tabs created using field sets

For those that have not made custom views before, I would definitively look at

https://community.plone.org/t/announcing-ambidexterity-ttw-views-defaults-validators-and-vocabularies-for-dexterity/

Basically, you just:

  1. Add a new view in the control panel

  2. Add some html to it, usually like this:

     <p><b>Phone: </b>${context/phone}</p>
    

Where 'phone' is the name of the field

Sometimes, you might need to use some TAL, for example

<span tal:condition="context/somefield" tal:content="structure context/somefield" />