I am an absolute beginner with SF6 (running Yosemite). When I look at my user font folder, ~/Library/Fonts in the Finder, there are 745 fonts. When I use SF6 it does not show the ~/library folder. In the Finder, one must hold option down to view the Library folder.
SF6 is able to show me the Library folder from another user account, but not my own actual account.