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How To Switch to Lower or Upper Case in Vi or Vim

January 23rd, 2014 by elizar

for uppercase: gggUG
for lowercase: ggguG

PS: the first 2 g’s are for moving to the beginning of the document.
PS2: works in vim, don’t know about plain vi

Can also do this using the search function in command mode

<esc> :%s/.*/\L&/

and in uppercase :

<esc> :%s/.*/\U&/

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