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Google Docs will also add some new open source fonts from the Web Fonts project: Amaranth, Arvo, Dancing Script, Lobster, Merriweather, Open Sans, Philosopher, Quattrocento.
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Google has recently updated the Android app for Google Docs and added offline support, while also improving the reading layout for tablets.
Update (February 6): Custom styles are now available.
{ Thanks, J. }