Preview: How do you change the default note font

I use Preview quite often to annotate screenshots to give to my developers to work on. I find it nice, simple and has most of the features that 3rd party screen capture vendors have, that i need. The only real issue i have is the default font size is huge. I'd like to be able to reduce the default font size (and possibly choose a different font) to be my default. I have to change it every time i use the application, which is quite often.

Does anyone know of a way to do this? Any changes to the plist file that i can make to reduce the default font size?