Proportional Spacing in Typography

What kind of spacing did proportional spacing replace?

Proportional spacing replaced what other kind of spacing?

Answer:

Proportional spacing replaced monospacing.

Proportional spacing in typography refers to the spacing between characters and letters in a text where each character takes up a variable amount of space based on its width. This is a contrast to monospacing where each character and letter takes up the same amount of space horizontally.

Monospacing:

A monospaced font is one in which each letter and character takes up the same amount of horizontal space. It is also known as a fixed-pitch, fixed-width, or non-proportional font. Variable-width fonts, in contrast, feature letters and spacing that are all the same width.

Monospace fonts have their uses:

Practicality: On all screen sizes, monospaced typefaces are exceptionally simple to read. This means that your clients can quickly and easily locate what they're looking for on any device, greatly enhancing the user experience. Your users may become clients more frequently as a result.