In typography, a specification added to manuscript or typescript copy indicating to the typesetter that the font used to set the specified material should be different from that used in the rest of the text. Typically, fonts are changed to indicate emphasis, titles, etc., or to set apart other parts of a page, such as heads. On a typewriter, change font is indicated by underlining, indicating that the italic version of the font should be used. On a typesetting device or in page makeup software, font changes are indicated to the device either using codes (as in old phototypesetting machines) or by highlighting the material to be changed and clicking on the appropriate font in the font menu.