Really Great App :)
I hesitated for a moment after reading highly-agreed negative comments, but I decided to give it a try, and I love it :)
To change the font size, just open it, click on its menu “Shorter Oxford English Dictionary” at the upper left corner of the screen of your Mac/Notebook (next to the Apple icon) and choose “Preferences.” I don’t think there is any possibility to change its font color or any other configurations, but I think it’s pretty organized and neat even though I have OCD. The only thing I wish it includes would be American pronunciations. Well, it does its job. Perfectly, to be honest. I didn’t expect it to have Le Châtelier, but it does. This is just awesome :)
Mike Lieu about Shorter Oxford English Dict