1. Layer masking can be used to create advanced mixing effects without changing original images.
2. Open Photoshop. Open main image which will be used as a base.
3. Open another image to apply Layer Masking Techniques.
4. Drag this image on the main image using Move Tool. Keep this Layer selected.
5. Select Elliptical Marquee Tool and draw the ellipse.
6. Select > Feather (Radius 9 )
7. Layer > Add Layer Mask > Reveal Selection
