Lexmark MX310
This option lets you print two or more pages of an original document on the same page. Paper Saver is also called N-up printing where N stands for the number of pages. For example, 2-up would print two pages of your document on a single page, and 4-up would print four pages of your document on a single page.
The Difference Between Power Saver (Sleep) Versus Hibernation on a Lexmark Printer/MFP
242.42 Paper Jam Error on a Lexmark MS310, MS410, MS510, MS610, MX310, MX410, MX510, MX510, MX610, or MX611 Printer/MFP