Mean line

In typography, the mean line is the imaginary line at the top of the x-height.[1]

Round glyphs will break (overshoot) the mean line slightly in many typefaces, since this is aesthetically more pleasing; a rounded shape will appear visually smaller than flat-topped (or bottomed) shapes of equal height, due to an optical illusion.


References

  1. Felici, James (2011). The Complete Manual of Typography: A Guide to Setting Perfect Type, Second Edition. Adobe Press. p. 315. ISBN 0-321-77326-8.



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