Advanced Tab  
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Advanced Tab provides some useful image enhancement tools for you to precisely tailor the image before the final scan. The effects of changes you make are shown in the Preview Window immediately.  
 
There are 4 tabs at the lower section of Advanced Tab: Gamma, Histogram, HSL and Threshold. These items are intended for users who are familiar with image editing tools and how they affect images. If you are just learning how to scan, then we strongly recommend not using these features until you become familiar with your scanner and its terminology. Many image-editing programs already have these features. However, if the need arises to adjust the color level of your scanned images, then click on the appropriate tab and perform the adjustments. Note: Before adjusting the Gamma, Histogram and/or HSL, perform a PREVIEW so you can view the changes before you scan.  
 
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Clicking anywhere on the above screenshot links you immediately to more detailed information of the selected function.