I have asked a question here about what should I add to .vimrc to map ALT + a to "h"; ALT + s to "j" and so on. The solution is adding the following to .vimrc:
noremap <Esc>a h
noremap <Esc>s j
noremap <Esc>w k
noremap <Esc>d l
Now, my problem is, that this solution does not work in INSERT mode (but works in NORMAL mode). Using imap results like typing h,j,k,l, iunmap results error.
How to set .vimrc to make ALT + wasd works like hjkl "cursor keys" also in INSERT mode?