A more professional-looking option is to have the print button open a new window containing a print-optimized version of the data which can then be printed.

How to Add the Print Option on a Web Page. If you have a Web page that you think viewers may want to print, add a print link to it. When placed in a noticeable location, a print link encourages ...

To print your screenshot, you need to first save your file. Click on the Save icon, or go to File, Save as…, and you will have the option to save your snip as a JPEG, GIF, PNG, or HTML file.