Typefaces are sets of characters that share characteristics such as size, point size, width, and weight. McCarthy and Mothersbaugh explain that these characteristics influence the visual appearance of letters, including style, height, weight, slant, underlining, color, and even movement in the context of digital media. Typefaces can impact semantic interpretation, influencing both brand perception based on the typeface used and the implicit associations between the typeface and the meaning of the text.

The United States Type Founders established a system for measuring font sizes in points in 1886. With the widespread adoption of computer tools, a distinction is made between bitmap fonts, which define each character by points requiring a specific file for each size, and vector fonts, which adjust the size according to demand, thus requiring only one file per font. ATM and TrueType fonts, developed by Adobe, are examples of vector fonts. Illustrations of these concepts are presented below.