Typography

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Anatomy of a letterform

Lesson 2 of 34 in Typography.

Typography Tutorial - X-height, ascenders, descenders, serifs, and MORE · LinkedIn Learning
Lesson

Typeface anatomy en.wikipedia.org is the naming scheme for the parts of a letter. Stems, bowls, shoulders, spurs, terminals, ears. The vocabulary looks fussy from outside and it exists for one reason: two typefaces can look identical at a glance and differ in four measurable ways, and without names you cannot say which four.

cap heightx-heightbaselinedescenderhpxpoint size measures the body, not the letters
Baseline, x-height, cap height, ascender and descender marked on a word.
A two-page spread from Bodoni's specimen book. The left page is the title page, MANUALE TIPOGRAFICO set in widely spaced capitals inside a double rule. The right page, numbered 244, shows the capitals A to L at enormous size in a serif with hairline-thin horizontals and heavy vertical stems.
A spread from Bodoni's 1818 type specimen book, with giant capitals whose thin strokes are almost hairlines. That extreme thick and thin became a style of its own.Manuale Tipografico, specimen page. Giambattista Bodoni, published posthumously by Margherita Dall'Aglio, Parma, 1818.Wikimedia Commons/Public domain

Try it

Drag the pen angle and watch where the thick strokes land. Nobody draws them; the angle of a flat nib puts them there.

Pen angle

30°

Nib width

26 units

Nothing in that drawing decided to be thick or thin. A flat pen is held at one angle and dragged; the stroke is at full width where it crosses the nib and thins to nothing where it runs along it.

At 0° the horizontal bar vanishes and the stress is dead vertical, that is a Didone, and it is why Bodoni looks engraved rather than written. Around 30° you get the tilted stress of a Renaissance face like Garamond, because that is the angle a right-handed scribe naturally holds a pen. At 90° the whole thing inverts and the verticals disappear.

Right now the thick axis runs at about 120°. Widen the nib without changing the angle and you get a bolder weight at identical contrast, which is exactly what a weight axis in a variable font does.

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Check what stuck

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Members answer these 3 questions and keep the ticket for this lesson. Every lesson has one.

  1. Question 1, locked

    Two faces are set at the same point size and one looks much bigger. What is doing that?

    • Its x-height
    • Its licence
    • Its file format
  2. Question 2, locked

    Which of these words means this? “The invisible line the letters sit on. Round letters dip very slightly below it on purpose.”

    • Baseline
    • Leading
    • x-height
    • Serif
  3. Question 3, locked

    Which of these words means this? “The enclosed or partly enclosed space inside a letter, as in o, e or n.”

    • Kerning
    • Counter
    • Lineal
    • Didone

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