If you don't want anyone else to use your screens, just tell people that these screens are copyrighted, although if you have used other media, say for example anything paid or free from the store, then I don't know how you would stand. If your own media and it is ALL your creation, you might just swing it. Press the green help button bottom right and ask the devs.
Aftershock Quad Core AMD FM2+ 3.5 GHz 8GB Motherboard and Processor, A7700k apu, AMD HD7870 gfx card.
King Korg Synth, Alesis SR18 Drum Machine, Akai MPX8 sample player, Roland Fantom XA Synth, Axus Digital AXK2 Digital Drum Kit.