Unfold the bottom section of the paper and repeat the process for this end.
Marking the paper for trimming
To mark the ends for trimming, use the back edge of your scissors to score a light line along the ceiling or skirting angle.
Lift the paper away from wall a little and trim to this line.
Brush the paper back down against the wall, expelling air from behind, particularly at the ends.
Try to avoid getting any paste onto the face of the paper - depending upon the paper you are hanging, it may discolour or damage it.
If you do get paste onto the face of the paper, remove it immediately with a damp sponge. Do not allow it to dry.
It is best to be methodical when hanging paper and to keep your tools clean all the time.
Trimming wallpaper with a straight edge and knife
As an alternative to this method you can do as many professional decorators do.
They use a steel straight edge pushed firmly into the angle to be trimmed and slice through the paper with a craft knife.
The knife must be kept sharp at all times, as a dull blade will pull the paper rather than cut it.
If you want to use this method, practice using a couple of offcuts first.
It works particularly well with contract vinyls and other heavy-duty papers.