Emacs: How to Define Super & Hyper Keys

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This page shows you how to define ❖ SuperHyper keys in emacs.

Emacs supports extra modifier keys called Super & Hyper. These keys are from lisp keyboard.

lisp-machine-keyboard-2-left
Symbolics's lisp machine keyboard PN 365407 Rev C. (Photo by Joey Devilla. Used with permission.) 〔➤ Space-cadet Keyboard and Lisp Machine Keyboards〕.

You can set Hyper & Super to PC keyboard's ❖ Win key or the ▤ Menu key, or Apple Keyboard's ⌥ option key.

Why Use Super & Hyper?

The advantage of creating the Super & Hyper in emacs is that you can have more hotkeys, and no major or minor modes will stamp on your keys. For example, Hyper for all your personal hotkeys, or for entering math symbols or Unicode. 〔➤ How to Create a APL or Math Symbols Keyboard Layout ⌨

Setting Up Super & Hyper Keys

Microsoft Windows

;; make PC keyboard's Win key or other to type Super or Hyper, for emacs running on Windows.
(setq w32-pass-lwindow-to-system nil)
(setq w32-lwindow-modifier 'super) ; Left Windows key

(setq w32-pass-rwindow-to-system nil)
(setq w32-rwindow-modifier 'super) ; Right Windows key

(setq w32-pass-apps-to-system nil)
(setq w32-apps-modifier 'hyper) ; Menu/App key

(info "(emacs) Windows Keyboard")

Note: in Microsoft Windows, several keybindings with the Windows key is bound at a low level, and applications do not see them. For example, 【❖ Win+r】 is for launching apps by command name. 〔➤ Windows Logo Key Keyboard Shortcuts〕 There's no way around that unless you use other tools such as AutoHotkey. 〔➤ AutoHotkey Tutorial〕 Even so, it may not be possible to disable 【❖ Win+l】 (lock window).

for more advanced keyboard tools for Microsoft Windows, see: Windows: Keyboard Layout Tools, Key Macro Tools ⌨

Mac OS X

; setting Super & Hyper keys for Apple keyboard, for emacs running in OS X
(setq mac-command-modifier 'meta) ; sets the Command key to Meta
(setq mac-option-modifier 'super) ; sets the Option key to Super
(setq mac-control-modifier 'control) ; sets the Control key to Control
(setq ns-function-modifier 'hyper)  ; set Mac's Fn key to Hyper

Note: if you set ⌘ Cmd or Fn key, some of their Mac function remains. For example, 【⌘ Cmd+Tab ↹】 still do switch app, and Fn key can still be used as the modifier for multimedia keys. Thanks to jcs, see 〔A Hyper Key for the Mac By Jon Snader. @ irreal.org…

See also:

Linux

By default, the ❖ Win key is ❖ Super.

On Linuxes, you should define Super & Hyper key in the OS. For example, in Ubuntu 11.04, it's under 〖System ▸ Preferences ▸ keyboard〗 then “Layout” tap, “Options…” button.

For more advanced settings, see: Linux: Keyboard Tools for Key Layout, Keymapping, Keybinding ⌨

Defining Super & Hyper Keybinding

Use H for Hyper, s for Super.

(global-set-key (kbd "H-b") 'backward-word) ; H is for hyper
(global-set-key (kbd "s-b") 'backward-word) ; lower case “s” is for super

(global-set-key (kbd "M-H-b") 'backward-word) ; Meta+Hyper+b
(global-set-key (kbd "M-s-b") 'backward-word) ; Meta+Super+b

Example of defining Hyper to insert special symbols:

;; some Hyper keys to insert Unicode chars
(define-key key-translation-map (kbd "H-3") (kbd "•")) ; bullet
(define-key key-translation-map (kbd "H-4") (kbd "◇")) ; white diamond
(define-key key-translation-map (kbd "H-5") (kbd "†")) ; dagger

For more detail, see Emacs: How to Define Keys.

Key Ghosting

Be aware that keyboard won't be able to detect certain combination of keys. This is called keyboard ghosting.

For example, on Microsoft Natural Ergonomic 4000 keyboard, the key 【▤ Menu+RShift+x】 does not register (but with left Shift it does). Vast majority of keyboards have ghosting problem. For detail, see: Keyboard Ghosting; How Many Keys Your Keyboard Can Take?.

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