Step 1: Selecting and removing artwork on a layer

First, select the image that need to place on the background layer using the rectangular marquee tool. Then select the move tool and drag the image to the other picture that you want to edit. However, when you move the image some unwanted background area also moved together with the image. To remove the unwanted area, the eraser tool is using by setting the tolerance.

Step 2: Replacing part of the image

To replace a fairly drab and overcast sky in the photograph with a more interesting sky or other picture, magic wand tool is using to select part of the sky. then hold down shift and click rest of the sky to select it. After that, copy the file of sky that need to put up and then paste into the sky that currently select. A new layer has been added to the layer palette. Select the move tool and drag the sky into the suitable position.