Which are the vim key notations?
Solution 1:
Use the vim help:
:h key-notation
The corresponding VimDoc page is http://vimdoc.sourceforge.net/htmldoc/intro.html#key-notation.
A partial reproduction:
notation meaning equivalent decimal value(s)
-----------------------------------------------------------------------
<Nul> zero CTRL-@ 0 (stored as 10) <Nul>
<BS> backspace CTRL-H 8 backspace
<Tab> tab CTRL-I 9 tab Tab
linefeed
<NL> linefeed CTRL-J 10 (used for <Nul>)
<FF> formfeed CTRL-L 12 formfeed
<CR> carriage return CTRL-M 13 carriage-return
<Return> same as <CR> <Return>
<Enter> same as <CR> <Enter>
<Esc> escape CTRL-[ 27 escape <Esc>
<Space> space 32 space
<lt> less-than < 60 <lt>
<Bslash> backslash \ 92 backslash <Bslash>
<Bar> vertical bar | 124 <Bar>
<Del> delete 127
<CSI> command sequence intro ALT-Esc 155 <CSI>
<xCSI> CSI when typed in the GUI <xCSI>
<EOL> end-of-line (can be <CR>, <LF> or <CR><LF>,
depends on system and 'fileformat') <EOL>
<Up> cursor-up cursor-up cursor_up
<Down> cursor-down cursor-down cursor_down
<Left> cursor-left cursor-left cursor_left
<Right> cursor-right cursor-right cursor_right
<S-Up> shift-cursor-up
<S-Down> shift-cursor-down
<S-Left> shift-cursor-left
<S-Right> shift-cursor-right
<C-Left> control-cursor-left
<C-Right> control-cursor-right
<F1> - <F12> function keys 1 to 12 function_key function-key
<S-F1> - <S-F12> shift-function keys 1 to 12 <S-F1>
<Help> help key
<Undo> undo key
<Insert> insert key
<Home> home home
<End> end end
<PageUp> page-up page_up page-up
<PageDown> page-down page_down page-down
<kHome> keypad home (upper left) keypad-home
<kEnd> keypad end (lower left) keypad-end
<kPageUp> keypad page-up (upper right) keypad-page-up
<kPageDown> keypad page-down (lower right) keypad-page-down
<kPlus> keypad + keypad-plus
<kMinus> keypad - keypad-minus
<kMultiply> keypad * keypad-multiply
<kDivide> keypad / keypad-divide
<kEnter> keypad Enter keypad-enter
<kPoint> keypad Decimal point keypad-point
<k0> - <k9> keypad 0 to 9 keypad-0 keypad-9
<S-...> shift-key shift <S-
<C-...> control-key control ctrl <C-
<M-...> alt-key or meta-key meta alt <M-
<A-...> same as <M-...> <A-
<D-...> command-key (Macintosh only) <D-
<t_xx> key with "xx" entry in termcap