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Structure of letters

Diagram showing cap height meanline x-height and baseline
Image caption,
A diagram showing some key measurements in typography

All letters sit on the . A capital letter’s height is known as the . The height of a lower case x is called the , and the top of this is the This is used to define the size of all the lower case letters. Using these measurements consistently in a typeface makes sure that all the letters work together. This creates unity.

Ascenders and descenders

Diagram showing ascender and descender on letters j and b

The part that goes below the baseline is called a . The part that goes above the meanline is called an .

Bar, arm, stem and bowl

Diagram showing bar, bowl, stem and arm on letters A B L E

Letters like A, e, f, H and t, have a part which goes across, this is known as the or crossbar.

Uppercase letters, E, F, T and Z, all have a part across the top or bottom of the letter known as the .

is a straight, vertical part, eg the letters B, D, F, H, L, R, b, d, t and l.

Letters such as B, D, p, q, R, b and d all have a round curve which is known as the .

Question

What is the meanline of a typeface?

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