In previous versions of ProPresenter, contiguous mode allowed you to see all of the elements in your Playlist in the Slide View area at one time. This has been renamed to Continuous Playlist and is an option enabled through the menubar.
This option is enabled by default. You can go to View>Continuous Playlist to toggle this option on/off for your users. Enabling/disabling this item will allow you to set this option for the Playlist window.