0 the key on a computer keyboard that you press in order to move down a line on the screen, or to mark the end of a section of text or data, or the act of pressing this key: --
Originally, the term "carriage return" referred to a mechanism or lever on a typewriter.
This screen is set to display markers which show the position of tabs, carriage returns, and text attributes.
The patronising term "silver surfer" suggests a pensioner just about able to type a few words into a search engine and press carriage return all on their own.