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Optical margin alignment outdents letters like A, V, W, Y, and punctuation into the margins to align the text border optically. Some users remark that it makes the text margin look crooked, but this is because text frames or margin guides are visible. If text frames are not visible, e.g. in print preview, or when printed, the edge of a block of text looks more even if optical margin alignment is enabled.
From the earliest days of machine printing, punctuation and Drop Capitals were indented slightly into the margin, as can be seen in the pages of the Gutenberg Bible in the British Library. Word-processing software lacks this attention to detail that could be achieved when manually setting type page by page, but professional page layout software like InDesign, Ventura and Serif PagePlus can now achieve this with a fine level of adjustment over which letters to indent into the margin and by how much.