Change the capitalization of text using Vim editor

To change the capitalization of characters in a word, line, paragraph, etc. using Vim editor do the following:

1. select the text which you want to change (using v, ctrl-v or shift-v in the command mode)
   
2. type ~

All uppercase characters is replaced with lowercase ones.
All lowercase characters is replaced with uppercase ones.

For example:

• TREE becomes tree
• Dog becomes dOG
• fish becomes FISH
• SomeStrangeText becomes sOMEsTRANGEtEXT

Enjoy using Vim!