Easy! First, take note of the various crease options. There are left and right creases for each, which are to used with the corresponding eye.Once you've chosen your desired crease, slide it to the top of the handle!Hold your Crease Piece gently against the designated eye and apply your shadow over the top edge as desired.Once you are finished building up your eyeshadow, remove your Crease Piece to reveal your coveted cut crease.For more details and tutorials, be sure to check out our 'How To Use' Page.