[header] How to change an image background in ms paint (green screen ) [title] Open the image in microsoft (ms) paint. [step] This should be the file for which you want to change the background. Compatible formats include bitmap (bmp), digital decompression (jpeg), and graphics interchange format (gif). 
To open the image : [substeps] Click " file " in the upper-left corner of the screen. The " file " button is located to the left of the " home " tab.