On your data screen, hit the settings button in the right hand corner then layout settings/export settings.
I also noticed there is "layout mode" in those options so you can do a bulk move/edit without having to tap and hold every gauge. I don't know how much time I have wasted because I didn't notice that....
You might want to get a file browser for your tab as well, makes some of these file operations much simpler.
I'm currently using File X-plore.