Im not sure

you cant, when making a post, there was an button to add an screen shot, however, the pretendo team is still working on it so it just showed a screen saying thar screen shots are not ready yet, it only works on wii u since there its fully implemented, we will have to wait for it.

also, the button does not exist anymore, so idk what the pretendo team will do about it, thats all i know.