Command verb

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In human-computer interaction, a command verb is a word with special and specific meaning that appears in a user interface. For instance, the words "edit" and "view" and "help" which appear in the web browser menu are all clearly verbs. Other items such as "file" or "favorites" or "tools" are nouns, but the verb appears in the submenu, for instance, "save", "open", "send", "add to", or "organize".

A web page typically includes a few such verbs also, typically including "search", "log in" and perhaps "edit this page".

A reflexive user interface is one in which commands and perhaps other controls are defined in the interface itself.