Step 3: Dividing your picture into smaller elements
Make lines on your edited photo at 10 and 20 cm. This is just to make the next step easier, if you find it hard you can skip this.
Cut out the squares between the lines. Cut 0,5 cm away from the lines! Otherwise you will end up with a distorted face in the end. If you did not make the lines just check the ruler and make the cutting free hand. Each square will measure 9cm in each direction.
Paste the squares into 5 new documents, 2 in each except for the last one which will have just one square.
If needed, rotate the new documents to make them printable.