Most screens sit a few millimeters below the body of the phone, so lets give it a shadow for some depth.First, select the Phone Body layer and using the Polygonal Lasso, draw a box around the heart, leaving a fairly wide border. Press CTRL+J (for PCs) to create a new layer from the selection and name it Shadow.Move the layer between Screen Top and Screen Middle. Double-click the layer thumbnail > select Drop Shadow and enter the values as shown.Your screen should look something like this.