You should start by opening a photo in Photoshop and examine the person or object that you want to cut out. You should select the object that you are cutting out. One of the best tools to use to make the selection is the Quick selection tool. For ideal results you should ensure that you select the entire object. You should note that it’s always better to select a lot of background than to miss a critical part of an object.
After making the selection, you should copy and paste it where you want. When you paste the new image will appear as a new layer above the background layer. To hide the layers you should click the Eye icon that is usually beside the background layer. Once the object is on its own layer you will be able to easily change the background to anything that you want.
If you want to remove the background of a photo without erasing any part of the object you should use the eraser tool. If there are missing elements in your photo you should use the clone stamp tool. You should Alt-click the area where you want to take a sample and then drag the tool over the missing elements of the photo.
You should fill in the missing edges using clone stamp tool. To do this you need to Alt-click the edge near the top of the photo and fill the area below it. If the edges aren’t clear after filling them you should use the eraser tool to clean it up.
If there are some elements of the photo that aren’t in good shape thus need to be reshaped you should use the liquefy filter. Once everything is in order you should resize the photo to your desired size. You can also wrap or transform it using the Transform options under the Edit menu.