Right click on the picture that toi want as your fond d’écran then click on set as fond d’écran image. ou if not, go on control Panel and change it from Display and Themes I think it's called.
u know stop joking it easy okay this is how toi take a picture of what u want it to be and it says set at background and thats how uuuuuuuuuu get it i dont have to say it agian geash!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! and those who dont know s i post yall dum an byeeeeeee!!!!!!!!!!!!!! PEACE!!!!!!!!!!!!!!!!!!!!!!!!!