In type design, the width and/or spacing values of a glyph change depending on the weight of the style to ensure a visual balance. However, some typefaces are designed as uniwidth (also called multiplexed), which means that the same glyph keeps the same width across all weights and styles of the family.

This feature facilitates digital typesetting, especially when there is an interaction between the user/viewer and the text on a digital screen. For example, words or parts of text can switch to a different style without modifying the typesetting of the block while hovering or clicking.