I am trying to map my Ctrl and plus sign together. This is what I am trying in my vimrc:nnoremap <C-=>    : echo Hello <CR> However it seems like the mapping is not being triggered.Any suggestions on what I might be doing wrong? I am using macvim.
Mapping Ctrl with equal sign
key bindings;macvim
Unfortunately, this is not possible. Vim relies upon ASCII representations of keystrokes, so it can only map to keys that produce ASCII results. Here is every ctrl+key that you can map to, and the byte it represents. Ctrl-@                 0x00            NULCtrl-A to Ctrl-Z       0x01 to 0x1ACtrl-a to Ctrl-z       0x01 to 0x1ACtrl-[                 0x1B            ESCCtrl-\                 0x1CCtrl-]                 0x1DCtrl-^                 0x1ECtrl-_                 0x1FCtrl-?                 0x7F            DELSource: Vim-FAQYou might be able to get around this by configuring you terminal to send a certain byte-sequence for this mapping, like in this stack-overflow thread, but that will definitely be a pain. Personally, I'd rather just pick a different mapping.This might eventually be fixed, but it's unlikely, since vim relies upon the terminal it's running in. However, there's a good possibility this will work in neovim. I don't know if that works right now or not.