No, those checkboxes control something entirely different - whether or not the contents of that table row can split over two pages on pagebreak, or the row in its entirety should appear on next page.
Once again, this time from the SAP Help:
Main Window on Several Draft Pages
Even though only one main window per form is allowed, you can copy it to several draft pages. Each main window then points to the same output control. You use this technique if you want the pages on which a table with items is printed to have different layouts. Height and position of the main window may differ on the different pages, but the width must remain the same throughout.
One can either have the same main window copied to all of pages of the form, OR one can have several, differently named main windows, but then the main windows on second and subsequent pages must not have any content assigned to them. If there is content assigned to second and subsequent differently named main window, it will not be output.
cheers
Janis