3If you want to see a small area of your image enlarged in the Before and After windows, click the Pan Mode box.
4Click Auto to have PhotoPlus make the tone adjustment automatically. You see the mapping curve change to reflect the modified image.
5Slide the Highlight control to the right to expand the highlight area. This also increases contrast in the midtones. Slide the control to the left to reduce the highlight area and darken the image.
6Slide the Midtone control to the right to lighten the midtones or to the left to darken these areas. Adjusting the midtones (also known as gamma value) does not affect the highlights or shadows.
7Slide the Shadow control to the right to reduce the shadow area and lighten the image. Slide it to the left to expand the shadow area and darken the image. This also increases contrast in the midtones.
8Click OK when you’re finished.
Sharpening
You can use the Sharpen tool to give your image a more focused look, with harder edges. Follow these steps:
1Select the area you want to change, or make sure no area is selected to change the entire image.
2Click the Sharpen button 
or choose Sharpen from the Enhance menu. The Sharpen dialog box appears:
4
Enhancing: Playing with Your Images