I have the same problem. There is no known solution, but a workaround I found is to open http://www.convertcase.net in another window, and whenever you type something, just copy and paste the letters you want smaller into the textbox and click the "lower case" button (I have no idea why it's called that). Then copy and paste the output back to where you were typing.
This comment took me 30 minutes to write.
HIGHLIGHT YOUR TEXT
PRESS CONTROL+D
should fix your problem, bro... and I just realized you asked the opposite question.
paste it all into this website and convert to lowercase.