Has anyone got a keyboard shortcuts sheet (single page) for After Effects CC?
Also, any custom keyboards for CC available?
I have seen keyboard shortcuts sheet for older versions of AE and keyboards for older version.
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There are nearly 900 keyboard shortcuts for After Effects. They can't all possibly fit on a single page.
The PDF version of the Help document that Hans points to has all of the shortcuts in a single reference section. You can get to the HTML version of the same content using the Help > Keyboard Shortcuts command in After Effects.