Mackle.—When part of the impression appears double.
Make-up.—To arrange the lines of matter into pages.
Make-up rule.—A steel rule with a projection on the top, for making up matter.
Making margin.—In imposition, arranging the space between the pages of a form so that the margin will be properly proportioned.
Making ready.—Preparing a form on the press for printing.
Mallet.—A wooden hammer.
Matter.—Composed type.
Measure.—The width of a page.
Monk.—A black spot in a printed sheet, owing to the ink not being properly distributed.
Naked form.—A form without furniture.