There are a few ways to get wrinkles out of a wall scroll. One way is to use a hairdryer on the low setting and hold it about six inches away from the scroll while moving it back and forth. Another way is to lay the scroll flat on a table or bed and place something heavy on top of it overnight, such as books. You can also try hanging the scroll in a steamy bathroom for a few minutes or using an iron on the lowest setting with a thin piece of fabric over the scroll. If the wrinkles are still not coming out, you may need to take the scroll to a professional framer or calligrapher for help.