First choose a paper to print by clicking on it. When you see
the paper on your screen,
click on 'print' in the menu-bar of your internet-browser and
the Origami paper
will be printed.
If you want to print the patterns for the leafs, first print
the front-side
of the pattern. Then, let the ink dry for a while. Then put
the same paper in your
printer again, make sure that the back of the paper is printed
on this time.
Now, you can print the back-side of the pattern for the leaf.
(Many printers do have the option of printing double-sized)