HELP: Little circle icon on my screen after installing Kodi

Hi Guys
I am quite new here and I have been looking around but I can not find a solution to my problem and I was wondering if any of you could help. After installing Kodi successfully I noticed this little circle icon on the right side of the screen. First it looked as it was a file but after I started to watch a movie, the icon had a changed and now it had a picture of a film in it. It does dissappear after a while but is there any chance to turn it off completely?
Thanks for your support in advance