Epson 2000 Reference Manual page 90

2. To use an image file as a watermark, click the Add PICT
button.
Note:
The Custom Watermark dialog box allows you to save PICT files as
watermarks. If you have QuickTime 2.1 or higher installed, images
in other formats can be used as watermarks because QuickTime
automatically converts them to PICT files. A message is displayed
if QuickTime encounters a graphics file that cannot be converted.
Select the desired image file, then click Open.
To create a text-based watermark, click the Add Text button.
Type the text in the Text box, select a font and a text style, then
click OK.
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Using the Printer Software for Macintosh