Print and Print Preview let you see how your sketch will look on paper and send it to a printer directly from the save screen.
Both options are available at the top of the save screen immediately after saving a sketch.
Print Preview helps you confirm page layout before actually printing.
The exact preview interface is controlled by your browser and operating system:
Use Print when you are ready to send the sketch to a physical printer.
ApProsal controls the sketch layout; your browser and operating system control printer selection and final print behavior.