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Choosing web fonts: A beginner's all-in-one guide
A checklist for choosing type
Emotive considerations for choosing typefaces
Choosing reliable typefaces
Exploring typefaces with multiple weights or grades
Exploring width in type
Choosing typefaces that have optical sizes
Pairing typefaces
Pairing typefaces within a family & superfamily
Pairing typefaces by the same type designer or type foundry
Pairing typefaces using the font matrix
Em
A unit of measurement, 1em is equal to the size of a font. Adjusting font size will resize glyphs relative to the em square.
Weight axis (wght)
An axis found in some variable fonts that controls the font file’s weight parameter.
Optical sizes
Different versions of a typeface optimized for use at specific sizes or size ranges.
Typeface
A typeface is what you see; a font is what you use.
X-height
The height of the lowercase characters that have no ascenders nor descenders, which indicates how tall or short the type appears.
Contrast
The difference between the thick and thin parts of a stroke. A monolinear typeface has low stroke contrast, and is the opposite of a high contrast face.