Modal Wave lets you include modal PopUp Windows like shown on this example page.
You will find the “Modal Popup” element to include inside the elements list of the Visual Composer. It is tagged with a Most Wanted tag since Most Wanted adds some extra functionality to it.
Once included to a page you find a set of self explaining options along with the link to page from where the content in the popup is taken.
For that matter a new custom post type named “Modal Window Pages” was created by the plugin.