Posted By:
Glenn
It is ambiguous (intentionally?) whether these are the guidelines for both left-right and top-bottom centering, or only for left-right (or, though it would be odd, only for top-bottom), and it's unclear if the adverb "approximately" is meant to modify 75/25 or only 55/45 to 60/40. Also, it's unclear how close "approximately" implies. Surely 61/39 is approximately 55/45 to 60/40, but what about 62/38? 65/35? 70/30?
They've left themselves a lot of wiggle room here.
<edited to delete the definition already posted above>