carlucci Hi
When you click "+ New" button, Joomla will create a new article with all default options. In order to have extra tabs like your screenshot, you need to assign this new article for a category which has 'Podcast' extra field group:
For example, the article in your 2nd screenshot is assigned to 'Carne' category, which is being assigned with 'Podcast' extra field so all extra fields tab will display.
