Cry is signed by looking sad and tracing imaginary tears down your face using your index fingers. Start with your dominant index finger extended just below your eye, and move the index finger down your face. Alternate with the other index finger on the opposite cheek. Move your index fingers up and down your cheeks in alternating or simultaneous motions, making your face look unhappy so that your baby understands the meaning.
The sign cry can be used to label the emotion when your baby or someone else is crying. Being able to name the emotion and share it with you can reduce your baby's crying and avoid contagion when someone else nearby is crying. "Jacinta is crying. Shall we cheer her up?"
Try to use this sign to encourage your baby to communicate instead of cry.