Point size refers to the measurement of the height of text characters in typography, commonly expressed in points (pt), where one point is approximately 1/72 of an inch. This measurement plays a crucial role in establishing typographic hierarchy and readability, impacting how text appears visually on a page or screen. Choosing the right point size helps differentiate between headings, subheadings, and body text, guiding the reader's attention and enhancing their overall reading experience.
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