You can show page breaks in Unified Modeling Language (UML) diagrams.
You can use page breaks to center a diagram on the minimum number of pages
if you want to print the diagram.
To show page breaks, an open diagram must have shapes and connectors
spanning over more than one default printer page. You must also have a printer
installed on your system so that information about the printer and printer
settings are available to the application for calculating page breaks.
To show page breaks, right-click an empty space in a diagram; then
click .