Bend all parts before peeling off the back of the self adhesive paper prior to sticking in place. If the card or paper requires to be folded the opposite way to the indication line then it may help to prick the card with a pin to leave a mark on the reverse side. It is then just a matter of lining up the pin holes with your steel rule before scoring and bending.

Score all parts before removing them from their sheets. Keep a dull edged knife blade for light scoring. It is best to practise on a piece of card or paper before attempting the real thing.