127: How do I bind keys (including function keys) to commands?
  
  1. Find out what character sequence is generated by the keystroke sequence
     you wish to bind to a command.  See question 131 for how to do this.
     Keep in mind that the character sequences generated by a keystroke
     sequence varies from one terminal to another.  You may also get
     different results depending on what type of machine you are running on
     (see question 130).  For example, these keystrokes may generate these
     character sequences:
  
       F1        ---> ESC [ 2 2 4 z
       Shift-R10 ---> ESC O t
       L7        ---> ESC [ 3 1 ~
       Remove    ---> C-@
  
  2. Figure out what the Emacs Lisp syntax is for this character sequence.
     Inside an Emacs Lisp string, RET, LFD, DEL, ESC, SPC, and TAB are
     specified with `\r', `\n', `\C-?', `\e', ` ', and `\t'.  C-x is
     specified by `\C-x'.  M-x is specified the same was as "ESC x".
     (Control characters may also be specified as themselves, but I don't
     recommend it.)  An Emacs Lisp string begins and ends with the double
     quote character, `"'.  Here are some examples:
  
       ESC [ D       ---> "\e[D"
       ESC [ 2 2 7 z ---> "\e[227z"                                          !
       ESC [ 1 8 ~   ---> "\e[18~"                                           +
       C-M-r         ---> "\e\C-r"
  
  3. If some prefix of the character sequence is already bound, you must
     unbind it by binding it to `nil'.  For example:
  
       (global-set-key "\e[" nil)
  
  4. Pick a command to bind your key sequence to.  A command can be a
     "symbol" with a function definition, or a "lambda list", or a string
     (which is treated as a macro).  For example:
  
       (global-set-key "\e[D" 'backward-char)
       (global-set-key "\e[227~" "\exgoto-line\r") ; macro
  
  See `Key Bindings' and `Rebinding' in the online manual.