Can I resize a Quick Selected image so it fits when I cut and paste it on a new background? I am trying to take a photo of someone and place it on a different background. The Quick Selected image is too big when I paste it on the background. You can only see a small portion of the persons head.
Open the photo, then go to Image>resize>image size. Read what the resolution is in px/in.
Get out of this screen. Then use one of the selection tools to select the person, go to Edit>copy to put it on the clipboard
Now, go to File>new>blank file. Enter width & height, and the same resolution value.
Go to Edit>paste. The person will be on a separate layer. Use the move tool to position, and, to resize with the corner handles, if necessary
Note: For printing, it is desirable to have the resolution in the 240-300px/in range. For web work, 72 px/in is ok
In addition to this you might also review here http://helpx.adobe.com/photoshop-elements/using/making-selections.html on how you can work with various selections.