i have a diagonal wall, which then recesses in ( the inside or a dormer window), how do i wallpaper this wall??

With care, use a sharp blade and cut down the diagonal edge in one quick move, then butt join to that edge with your paper that goes down the slope of the roof.

Hi, Proctor has got it has good as its going to get im afraid, and like he said have some brand new sharp blades, try get your self a scapel from a art shop, and your could always drawing pin a string as a guide cause the cut needs to be certain and fast like Proctor said.'kind regards chris