Constant is best suited for setting short headlines, word marks, posters and other visual communication ephemera. Particular when set in all uppercase the typeface’s squarish and resolute nature commands attention and projects authority. Despite the prominent slab serifs and their angular corner details, these fonts work well also for shorter text passages, especially in the lighter to medium weights. When typesetting Constant in paragraphs spanning several lines the face requires a fair amount of leading to not appear vertically compressed.

As customary for Underscore’s catalog the fonts have very extensive support for languages in the Latin script, reaching from Afrikaans to Vietnamese and Zulu. The fonts are carefully spaced, kerned and hinted, and include a variety of typographic glyphs and OpenType features like various ligatures, number features and case alternatives.