The new Smart Brush tool automatically performs some very popular tasks in Photoshop Elements 7. You can brighten a sky, create one of those artistic and very popular selective coloring images, and much more. There are two tools on the Smart Brush popout on the toolbox. The Smart Brush
determines the edges automatically. If you prefer to have the effect only where you paint on the image, choose the Detail Smart Brush
Choose the Smart Brush in the toolbox to activate the tool, and then choose an effect in the Smart Brush popup menu on the options bar.
The Smart Brush creates a selection as it applies the effect. If necessary, you can refine the edge of the effect using the Refine Edge filter located on the options bar or at Select > Refine Edge.