In typography, what does the term "leading" refer to?

The term "leading" in typography specifically refers to the vertical space between lines of text, which is a critical component in creating readable and aesthetically pleasing text layouts. The name "leading" originates from the early days of typesetting when thin strips of lead were inserted between lines of type to create space. Proper leading helps to prevent lines of text from appearing too cramped or too far apart, contributing to the overall clarity and flow of the written content.

This aspect of typography plays a vital role in visual hierarchy and text legibility, especially in materials intended for print or digital media. By adjusting the leading, designers can improve how the text is perceived and ensure that readers can easily follow and understand the written message.