Question

I would like to use <Space> as a modifier, just like Ctrl, Alt or Shift.

For example, the hjkl keys could jump 10 times instead of just one when Space is pressed. Something like:

nnoremap <Space-h> 10h
nnoremap <Space-j> 10j
nnoremap <Space-k> 10k
nnoremap <Space-l> 10l

This almost works:

nnoremap <Space>j 10j

but I need to release the <Space> and press it again to repeat the custom movement.

Answer 1

arpeggio is a Vim plugin that lets you define keymappings of simultaneous keys to other keys, e.g. j and k at the same time to have the same effect as <Esc>.