Samsung ML-4600 - Manual (Page 116)

A
PPENDIX
A.19
Using Your Printer with Macintosh
Choose Watermark if you want to add a watermark to each
page in your document to emphasize its purpose or indicate
how it should be handled. For details on the watermark
option, see page
5.14.
3 Choose your paper size, orientation, paper type and other
options and click OK.