Hello, There is another way to change case that may be a little faster. It is pretty much like the example provided but it involves using a blank document. If you have large amounts of text to change case on, this may help.
Simply copy the entire document, or the portion you would like the case changed, open a blank document and paste the data, directly below the data, in the next available row. Type =Proper(A1)(or any other case you desire). Then click the bottom right corner of that cell, and drag to the right until it is the same width as the data above, then click and drag down to match the same length. You will notice all of your data is now changed. You can do this multiple times on the same document if you have a variety of cases you want to go through. From there, you just copy your new case data and paste over into your old document. You could do this in the same document but this keeps it a little bit cleaner.