How do you change your background?

The most important factor is to start corectly, whatever wallpaper you are hanging. This is to start from a corner of the room, but not right into the corner but a couple of inches away from the corner. This is because the walls of a house are not usually perfectly flat or perfectly straight and the ceilings are not exactly horizontal.

So, about 2 inches from the corner and near the ceiling, make a mark on the wall with pencil. Then hang a plumb bob, a weight on a string, and put more pencil marks on the wall downwards. to show how the plumb bob has given you an exactly vertical starting line. That is where you hang your first length of wallpaper with the edge of the wallpaper following the vertical line marks, Then you can hang the second length exactly next to the first until you reach another corner. Cut along the length of the next sheet so that it will turn the corner by two or three inches.

Never hang a length which overhangs a corner by more than two or three inches. Use your plumb bob and pencil again when you work away from the corner.