Help screen toolbar icon Fields
From Joomla! Documentation
Fields: This button opens a window that allows you to easily create a link to any field on the current site. The link is created using the fields title as the link text.
To create a link to the desired field:
- Place the cursor at the point in the article where you want the linked field title to be inserted.
- Click on the Field button to open the window.
- Click on the title to select the desired field in the window. You can use the filters and search to help find the desired field.
- A link with the fields title will be inserted at the current cursor location.
- If needed, you can edit the link text.