echom and echoe - print message and error message, later can use :message to show all previous printed message.

se[t] numberwidth=2 (default is 4)

map <c-d> ddp – this map ctrl-d to dd and then p map _ ddkkp – this map _ to delete line and then go up 2 line and then paste

nmap: (nnoremap) map in normal mode vmap: (vnoremap) in visual mode imap: (inoremap) map in insert mode: this could be use for intellij live template imap soul System.out.println(“”); imap ddi : need to escape the insert mode then delete line

VERY USEFUL: imap viwU : convert a just finished type word to all upper case.

nunmap U - unmap U in normal mode

use *noremap!!!!!

1. i - insert mode
2. Ctrl+o issue normal command without leaving insert mode
3. 80 - number of repetition
4. i - insert
5. type the charactors you want to repetition insert
6. Esc - leave the insert mode