Maybe what I'm trying to do is not really legal but it's for my boyfriend, I just would like to send him pictures in the snapchat way. It means that I would impose a picture on his screen for a while without message to open before and without closing/deleting any work he could be doing.
We both have ubuntu and I don't know other places to get answers so if you also have ideas for my research, I take every kind of help...
Feel free to improve my request :)