Hi Patrick -- We're looking at adding the ability to print in a release coming in the first half of next year.
It'd be helpful if you could provide some additional information about how you'd use the printed story. Do you want to print a finished story or a draft to share for comments? Do you want to print directly to paper or just save to PDF? What are the most important aspects of the story that you'd like preserved in the printed version?
The print capability that exist within the Classic Storymaps is ideal for my use as the creator of the Storymap, however, I recognise for some readers of the Storymap the ability for them to be able to print the product is a useful addition and adds significantly to its functionality..