You don't do anything :D Click the printer to print a paper. Hold space and click the papers to delete them. You can also drag a paper.
75 papers now. I may or may not make more from this, all I know is that I will add more papers. Update Log: 1.1 Added 10 papers. 2.0 Added 25 papers. Added the "Blue" effect. 1 in 4000 chance for everything to explode when printing a paper. Printer doesn't like it when you print too much. More to come :)