Create a 3D Sphere in Photoshop Elements 12
Create a circle on a layer.
Double-click Background in the Layers panel if the photo is not currently on a layer.
Use the Elliptical Marquee tool, press Alt/Option+Shift, and draw from the center out to create a circle in the middle of the photo. If you want to move the circle around the photo while creating the marquee, press the spacebar while keeping the Alt/Option and Shift keys pressed. As you drag, the cursor the circle moves. You can also move the selection after creating it by placing the cursor inside the circle and drag around the photo.
When you have the area selected as you like, press Ctrl/Command + I to inverse the selection so the outside area is selected.
Press the Delete key to delete the area surrounding the circle.