To insert special characters in vim, while in insert mode, use <Ctrl+k>,
followed by a two-character code. Some examples include:
oo • (bullet)PR ▶ (black right-pointing triangle)Tr ▷ (white right-pointing triangle)Db ◆ (diamond bullet)'% ϴ (Greek theta)Pd £ (British pound symbols)Co © (copyright symbol)Rg ® (registered trademark symbol)Eu € (euro symbol)-1 ‐ (hyphen)-N – (en dash)-M — (em dash)Check out :help digraph for more information. There is also the :dig
command.
Originally found here: https://vimtricks.com/p/insert-special-characters/