Brother HL-4200CN - Manual (Page 162)

APPENDIXES A - 8
Printable Area
When using A4, 8.5" × 14" (Legal) or smaller.
■ “Printable area" refers to the area on a page
where printing is possible.
■ "Non-printable area" refers to the area (the edges)
on the page where printing is not possible.
1. Printable area
2. Non-printable area