The imageable area on a page does not change with additional RAM in the Color LaserWriter 12/600 PS printer. The imageable area is defined in the PPD file for a specific printer. You can view the image values by opening the PPD file in a text editor or word processing application. Search through the text until you see the imageable areas defined. The formula to determine the imageable area is a little complicated, but here are the results.
Note: The results are posted in fractions of an inch and are rounded to the nearest 100th of an inch.
Imageable Areas
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Letter
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left margin - .20
right margin - .20
top margin - .315
bottom margin - .20
Legal/US Legal:
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left margin - .20
right margin -.20
top margin - .315
bottom margin - .20
A4:
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left margin - .20
right margin - .20
top margin - .32
bottom margin - .20