System fonts don't display in Pages 5.5 As much as I hate the new Pages, I use it because it was a resource all my devices could update/re-upload before Microsoft Office came out on iOS devices. However, there are some fonts missing that are clearly OS installed.

Furthermore, it's valid, in my Font Book and in my System > Library > Fonts folder. I use it in Xcode and am trying to create a PDF in Pages to include in my application, so naturally, keeping the same font would be fluid and professional. However, it's not displaying as an option to choose and there is no preferences settings for fonts and I've tried repairing disk as a just-in-case measure. All my custom installed fonts display as an option to choose in pages but not select system fonts. this is not pages in iCloud Any suggestions?

EDIT: Not that it would matter, because it's more than this one specific font, but the font in question is 'Heiti TC Light' [an OS installed Font]. I just know I'll get a comment asking this. But again, it's more than this one.
Try looking for these fonts in Format > Font > Show Fonts.  That should always give you a full list even if the dropdown menu inside Pages for some reason does not.