Pressione Ctrl + V e pressione a tecla Pausa depois de digitar noremap
.
No meu sistema, a tecla Pause é mapeada para o código octal 035 (decimal 29), portanto :noremap <Char-035> k
maps Pausa para o k tecla.
Veja abaixo a ajuda do Vim:
There are three ways to map a special key:
1. The Vi-compatible method: Map the key code. Often this is a sequence that
starts with <Esc>. To enter a mapping like this you type ":map " and then
you have to type CTRL-V before hitting the function key. Note that when
the key code for the key is in the termcap (the t_ options), it will
automatically be translated into the internal code and become the second
way of mapping (unless the 'k' flag is included in 'cpoptions').