[Dwedit]

I think it's pretty clear, the fold indicates what should be the top side of the page, and the lines indicate it wants printed side up.

[dheera]

> what it wants printed

That's the part that isn't clear. How do I know that the lines don't indicate "what is already printed" and the blank side indicates "the blank canvas that it wants as input"?

[aendruk]

If you put the printed side up, the next print will be superimposed and make gibberish.