Changing The Paper Size - Epson Stylus Photo User Manual

Finest Detail
If you select Fine - 720 dpi as the Print Quality setting, you can
turn on Finest Detail to print text and line art with very sharp
edges. Be aware that it may take considerably longer to print
using this feature and it will increase your Macintosh memory
requirements. Additionally, you may not be able to print some
larger images, and some patterns may not print correctly. If
you experience problems printing with Finest Detail on, turn it
off or add more memory.

Changing the Paper Size

To change the paper size, choose Page Setup from the File
menu of your application. The following dialog box appears:
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Using the Printer Software for Macintosh