Title Case for Headings and Buttons

Mixed casing across a single surface makes headings stop reading as headings and buttons look half-finished. Chicago Title Case gives one deterministic rule — capitalize principal words, lowercase short articles, conjunctions, and prepositions — so labels stay predictable as the product grows. The rule is scoped to product UI: marketing pages deliberately invert it and use sentence case, because long persuasive headlines set in Title Case read as shouting. Pick the casing from the surface you are on, then never mix the two within it.