Hi could you give us a little bit more information to go on? If you are working on a tutorial can you give us a link to the tutorial and tell us what step you are having problems with? There are many tools that have a profile function feathering, transparencies, contours, blends... We need an idea where to start

Another thing that can be helpful to others trying to help you is if you can post your .xar file or at least a screenshot.