VIM contains a 'set guifont' option to change the font. Neovim does not support this option, so I am wondering if it's possible to change the font Neovim uses in the Terminal?
Answer
This is not for a terminal, but still it might be useful to someone.
For Neovim-Qt GUI client, you can change the font by Ctrl + mouse scroll if you put the following to ginit.vim:
let s:fontsize = 12
function! AdjustFontSize(amount)
let s:fontsize = s:fontsize+a:amount
:execute "GuiFont! Consolas:h" . s:fontsize
endfunction
noremap <C-ScrollWheelUp> :call AdjustFontSize(1)<CR>
noremap <C-ScrollWheelDown> :call AdjustFontSize(-1)<CR>
inoremap <C-ScrollWheelUp> <Esc>:call AdjustFontSize(1)<CR>a
inoremap <C-ScrollWheelDown> <Esc>:call AdjustFontSize(-1)<CR>a
For those who prefer using keyboard, there is a nice way to use numpad's + (kPlus) and - (kMinus)
" In normal mode, pressing numpad's+ increases the font
noremap <kPlus> :call AdjustFontSize(1)<CR>
noremap <kMinus> :call AdjustFontSize(-1)<CR>
" In insert mode, pressing ctrl + numpad's+ increases the font
inoremap <C-kPlus> <Esc>:call AdjustFontSize(1)<CR>a
inoremap <C-kMinus> <Esc>:call AdjustFontSize(-1)<CR>a
Obviously you can replace Consolas with the font you prefer.