Next you'll need to cut out a piece of the new polarizing film to the exact shape of the original piece. Make sure that you are cutting out the film with it turned in the right direction. Make doubly sure you have the film oriented so that it will make the display look reversed before you place the old piece on top as a cutting guide. Hint: you can tell when the two pieces are the right way because the original piece that you are using as a cutting template should look completely black. Notice in the picture below how the display is invisible without the polarizing film. Also notice the small box on the display in the upper right corner; this will be disappearing when we reverse the display using this 'hack'. The factory reversed modules manage to reverse the box too - interesting distinction.



Hold the original piece of film tightly up to the corner of the new sheet and gently cut around it using your sharp knife. Make several slices using medium pressure rather than trying to cut all the way through on the first pass. By making several slices you will avoid slipping and hopefully avoid the loss of any finger tips! Just take your time.



Once you have cut out the new piece of polarizing film, hold it over the display to make sure that it fits and that it will create the desired negative effect. The film used here (details at top) was self-adhesive on one side and had a protective cover on the other. Remove the cover from the self adhesive side and without touching it carefully place the new piece of polarizing film onto the glass screen. Use your tweezers for better precision. Gently rub the polarizing film with a soft cloth or clean Q-Tip to make sure it is adequately stuck down. Then use your tweezers again to lift of the protective cover from the front of the film. You should be left with a smudge and fingerprint free surface.