Hi Rich! Thanks for reaching out here, and for your interest in our calendar. We appreciate it and are happy to answer any questions you may have about how it behaves. While the plugin doesn’t have any code in it specifically meant to ease with print view, in general – with most themes – you can find a view that works well under Events -> Settings, in the Template tab, and print that from there. If that doesn’t do the trick you could also always try to “Save to PDF” route and print that, which may be easier / more flexible than just printing the page directly.
Sorry I couldn’t offer up more here – basically if you’ve found the free (The Events Calendar) version has a view that prints well with your theme, the PRO release will share that behavior and will print as expected. If you have any other questions or if I can elaborate here please let me know. Thanks!