When I hit the PrintScreen key (PrtSc / Sys Rq) beside "F12" I have this window appearing, with no real option/preferences I would like when I hit that Print screen key on my keyboard that it take a full screenshot immediately, instead of asking me questions, I'm ok it asks where to save after taking the screenshot, but not asking questions when hitting the PrtScr key (on Ubuntu-MATE it looked like a very similar screenshot software that this one, but it was taking screenshot when hitting that screenshot key without asking questions before screenshoting

how / where do I need to go to set those preferences?