FiftyThree's excellent drawing app Paper just got a little bit better. The update to version 1.0.23 isn't a huge overhaul, but comes with a couple of tweaks to improve both the creation and sharing of your pictures. The first addition is the ability to export multi-page PDFs of your sketchbooks to other applications or email. This works much like the sharing functionality built into Android, giving you a simple list of compatible apps that can open PDF files — on our iPad, the feature worked with iBooks, Kindle, CloudReaders, and Dropbox. That last app in particular should make it a lot easier to show off your penmanship. Sharing individual pictures, however, remains limited to email, various social networks, and saving to your camera roll.

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The update's other main feature is an extension of the Rewind undo feature where you swipe with two fingers in an anti-clockwise circle to remove unwanted strokes. Previously this only worked with the last 20 lines drawn, but that's now been extended significantly — we're not sure exactly how much by, but we were able to erase a 50-stroke picture completely. Any more than that and you're probably better off using the eraser function, as the gesture gets pretty tiring after a while. The update is available now in the App Store, and the app is free with in-app purchases for various drawing implements.