Xbox One users have a few options when it comes to adjusting the size of their pictures. The first option is to adjust the picture size on the Xbox One’s settings screen. To do this, open the Xbox One’s settings screen and select “Picture.” Then, select “Width” and “Height.” Finally, select “Quality.” If you want to change the picture size on a per-picture basis, select “Quality” and then individual pictures will be displayed in order from smallest to largest.