If you want your story to reflect the online layout when printed, simply use the Save as PDF option and download a copy of your story. Once downloaded you can print out your story.
If you were looking to alter the design of your story when printed, take advantage of Educa's Print Wizard.
The three step process will allow you to select a template, add a border and determine which sections of your story are printed. Once you've completed each step you'll be able to review your story before printing it off.