ProE/ Creo has some default font types in part and drawing modes. These font types are good to go when you just type notes in drawings or you just want to have a text in place not bothering about the type of font or style. But when your design has a focus on the text style these default font types wont help you. There are many stylish font types available in windows and also on the Internet. You can use these fonts in your design if you want to and ProE gives an easy option to do that.