Step 4

When you’ve drawn the left wing, duplicate the Lead layer by hitting command-J (control-J). Flip the layer (Edit > Transform > Flip Horizontal). Hold down the command key (control) to temporarily access the Move tool, and slide the flipped wing to the right while holding down the Shift key as well. (Holding the Shift key down constrains the movement to 45, 90 or 180 degree angles.)