Vim Show lines relative to the cursor position

:set relativenumber




It is useful when you want to delete a block of lines, quickly without entering in visual mode and selecting 

For example, 
To delete lines Setima Linha (0) until  Nona Linha (2) , just type:
 d 2 j

To delete lines from Setima Linha (0) until Segunda Linha (5), just type:
 d 5 k