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.
Open the File menu and select Page Setup.
Select WorkForce 30 as the Format for setting.
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.
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.
Envelope #10 (4 1/8 × 9 1/2 inches)
Choose portrait or one of the landscape orientation options for your document or photo. (Choose the first landscape option for printing envelopes.)
Click OK to close the Page Setup window.
Now you can select your print settings and print.