[[zh:Emacs快捷键笔记]] This page is about the notation of [[key sequence]]s in Emacs documentation and in Emacs itself (GUI, terminal-mode). == Overview == ; C-: means (press and hold) the Control key ; M-: means the [[Meta]] key (the Alt key, on most keyboards) ; S-: means the Shift key (e.g. `S-TAB' means Shift Tab) ; DEL: means the Backspace key (''not'' the Delete key) ; RET: means the Return or Enter key ; SPC: means the Space bar ; ESC: means the Escape key ; TAB: means the Tab key A notation such as `C-M-x' (or, equivalently, `M-C-x') means press and hold ''both'' Control and Meta (Alt) keys while hitting the `x' key. See the section "Kinds of User Input" in the EmacsManual ([[Manual:User Input]]). == Angle-Bracket Notation == Some keys are referred to as "function" keys or "pseudo" keys. This includes keys that are not among the keyboard function keys `F1',...`F12'. It includes keys that might not be on your keyboard, but are on other keyboards. It even includes keys, such as `####', that are not on any keyboard, anywhere. For one thing, Emacs treats menu bindings as key bindings: a menu item is implemented as a pseudo key. Starting with release 21, the GnuEmacs maintainers decided to denote such keys by enclosing their names in angle brackets: '''##<...>##'''. Examples: `####' is the Delete key, `####' is the Insert key, and `####' is the Tab key (or rather it is sometimes, depending on your keyboard). Modifier keys that are part of a key sequence that contains a pseudo key are sometimes written inside the angle brackets: `####', `####'. And sometimes they are written outside: `##S-##', `##C-##'. === Are angle brackets really necessary, in order to disambiguate keys? === '''No.''' If you would like to do without the angle brackets, at least in most interactive contexts (i.e., not hard-coded, literal occurrences), you can do so. Just use library '''NaKeD''' (No Angles Key Descriptions). ---- CategoryHelp CategoryDocumentation CategoryKeys