Now you just stick the paper on the wall. (I'm reusing the same picture from the last step, sorry if the surprise has been ruined.) As you can see from the picture, I had some crinkling issues. You can just smooth the paper from the center as you go. This is where you should check for total composition level by measuring the distances from the floor/ceiling to your frame outlines on both ends of the paper. A bubble or laser level works too- whatever level of precision you want to bring to the party is great.