Any chance of a 6K timeline to match the pocket 6K?

I've downloaded the latest beta, and would like to grab some stills from the footage in 6K so I can print them at a decent size - I can't find 6K resolution in the timeline or in the deliver tab, even if I choose an image format. Am I missing something or is this just not in the software yet? Any other way of getting a 6K still from it? Cheers!