Keycap

Two-shot injection molded keycaps
Swappable keycaps of a French Model M keyboard

A keycap is a small cover of plastic, metal, or other material placed over the keyswitch of a computer keyboard. Keycaps are often illustrated to indicate the key function or alphanumeric character they correspond to. Early keyboards were manufactured with the keyswitch and keycap integrated in one unit; keycaps separate from the switch were introduced to facilitate the production of different keyboard layouts.