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Viewing invisible characters, especially spaces & tabs would definitely be a good feature, I'm using daily textastic for Python coding and am collecting quite a few unnecessary trailing spaces in sources (maybe an option to show only trailing ones ?)
Customer support service by UserEcho
I agree with Steven Lu, we have the same behavior for Command+Up / Down and Control+Up / Down, it would be good to have one set of keys replaced with page up / down action (Command + Up / Down ?)