Vi/vim includes the tilde operator, which switches the case of the text covered by a motion.  For example, consider the following text string:

abCdEfG

In vi/vim, if the cursor is placed over 'a' and the user presses

~

or

~<space>

, 'a' is converted to 'A'. If instead the cursor is placed over 'a' and presses '

g~~

' then the string is converted to

ABcDeFg

It would be nice if Qt Creator supported this feature, as it is very useful.