If you’re not a fan of the default “Marker Felt” font in the Notes app on your iPhone, iPad, or iPod touch, you’ll be happy to know that you can easily choose from two alternate fonts. While Marker Felt was the only font available for the first four years of the iPhone’s life, Apple quietly snuck in the ability to change it in iOS 4.2. Simply go into the iOS Settings app and select Notes and you’ll see an option…