Print From Your Computer : Macintosh Printing (Mac OS X 10.3 and 10.4)

Select Page Options
Open the Page Setup window to select your page options.
1.
Open the File menu and select Page Setup.
2.
3.
Select the Paper Size setting for the paper you loaded.
If you want to print a borderless photo, select the paper size with a Sheet Feeder - Borderless option.
Note:
For borderless photos, make sure you loaded a compatible borderless paper size and type.
Paper size settings
You can load paper in these sizes and select the size in the printer software. A Custom option is also available so you can create a custom size (in OS X 10.3.9, select Custom Paper Size from the Settings pop-up menu).
A4 (8.3 × 11.7 inches [210 × 297 mm])
A6 (4.1 × 5.8 inches [105 × 148 mm])
Letter (8.5 × 11 inches [216 × 279 mm])
Legal (8.5 × 14 inches [216 × 356 mm])
4 × 6 inches (102 × 152 mm)
5 × 7 inches (127 × 178 mm)
8 × 10 inches (203 × 254 mm)
Envelope #10 (4 1/8 × 9 1/2 inches [105 × 241 mm])
4.
Choose a portrait or landscape Orientation option for your document or photo. (Choose  landscape left for envelopes.)
5.
6.
Click OK to close the Page Setup window.
Now you can select your print settings and print.