The Midtone is a relative measure of the gamma of your monitor. The scale for Midtone ranges from 0 to 255. The gamma curve is a geometric series. This means that at a value of 255 it tends to infinity.
The Midtone is bound by the Shadow and Highlight terms and cannot exceed them at any time. So, if the Highlight is set to 255 and the Shadow is set to 0, a gamma of 1 is equal to a Midtone of 128. Similarly, if the Shadow is set at 200 (lower boundary) and the Highlight is set at 220 (upper boundary), a gamma of 1 is equal to a Midtone of 210.
Operation:
1.Select the Advanced... button on the Balance tab. This will display the Level adjustment window.
2.On the histogram, use the mouse key to click on the black, gray ,or white triangles to make changes to the Shadow, Midtone and Highlight respectively.
3.To see the changes and compare them to the original previewed image, click on Sample 1 to see the enhanced image.
4.To make a second enhancement for comparison, click on Sample 2. Make new enhancements to the original. Compare the images of Sample 1 and 2.
5.After completing enhancement settings, click on the desired sample to choose the image
5.Click OK to save the changes and close the Enhancement dialog box. If you do not want to save the changes, click on the Cancel button to close the Enhancement dialog box. Click Auto button to allow the software to make appropriate highlight and shadow adjustments.
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