Modal (Record) Select Field Guide
The modal select form field provides a modal window to allow the user to select an item from a page displaying multiple rows.
Field Settings
Joomla Component: It is the name of the extension for which the records will be retrieved. For example, to list Joomla articles, use the value "content".
Views: The name or value of view. For example: "articles".
Database Table: It is the name of the database table. For example: "content".