formatting preferences

I can't seem to figure out how to change my default/preferred formatting styles. When I drag/insert a field onto a LCD (8.2.1) form it always is Myriad Pro, 10 pt. I want it to be a different font (Calibri, 12 point). I really don't want to have to change it manually for each field that I put on the form.
How do I set it so that my default font is not Myriad Pro? Thanks