This is part of a series of posts that give you very small, quick tips on how to do things in VIM. This time: converting motions to upper- or lowercase. There are many ways to do this, but this is the one I'm using.
Suppose you have the following "word":
If you wanted to convert that to uppercase, move to the beginning of the word and type
gUw from normal mode, where
w is the word motion. This will give you
SCREAMING_SNAKE. Now, if you hit
guw, it will revert back to the original.