A select field pre-filled with your site's fieldsets. Pretty simple!
It’ll let you create them on the fly, too. Click the + button and type away. A barebones fieldset will be created that you can use immediately. Then simply go and edit the fieldset later.
If you’ve created a fieldset in another tab while you’ve had this page open, you can click the refresh button to see any additions.
This fieldtype supports the following settings in addition to the defaults.
Show hidden fieldsets.