Can someone walk a newbie through the steps to follow in order to remove a background color from an image? I have a png image loaded, but I can't for the life of me get rid of the background. Please be as cryptic as you like. Just list the tabs/selections I need to make to lose the background. Thanks in advance.

Please read the tutorial "Replacing image background" under the Help->Tutorials menu that shows exactly what you need to do.