To use paper to decorate a wall, first decide what kind of paper you want to use, such as wallpaper, wrapping paper, or scrapbook paper. Then, measure the wall to determine how much paper you will need, and cut the paper to size. Apply adhesive to the back of the paper and position it carefully on the wall, smoothing out any bubbles or wrinkles. You can also make a collage by cutting various patterns and colours of paper and arranging them on the wall in an appealing pattern.