disable infobox when taking screenshots with xfce screenshooter

I want to take screenshots very quickly and when I press the print key xfce-screenshooter takes a screenshot and saves it automatically in my pictures folder. The problem is every time I take a screenshot there pops up an infobox on the screen which says I have taken a screenshot. So when I take the next screenshot the box is on the screenshot picture which is annoying. I haven´t found a way to disable this feature. Does anyone has any idea how I can disable this feature so my pictures are free of this infobox?