wow i thought everyone knew this. lol. does she do a close one if you hit down? I haven't toyed around with her that much yet in demon mode but the little time I did, I figured out about the full screen one.
Edit:it's not down, it's back for the one up close.
Not sure what move list your looking at but I'm looking at the ps3 moves list right now and it only has Regular Negative Mass, Close Negative Mass and Far Negative Mass. No Full Screen Negative Mass.
Anyway thanks OP! This will definitely come in handy. I can think of a couple Deathstroke players who won't appreciate this very much.