Apple Color OneScanner 600/27 - Manual (Page 64)

5 In the Threshold dialog box, make the changes and selections you want.
m If you want the Dispatcher to recommend the appropriate threshold
settings, click Suggest.
m If you want to customize the threshold settings yourself, you can.
To set the lightest value, click the highlight dropper and then click the spot
in the original that you want to use as highlight threshold. The slider
adjusts to show the point you set, and the result adjusts to the change. The
point you set becomes the lightest color in the image. Colors lighter than
this point are reset to this level.
To set the darkest value, click the shadow dropper and then click the spot
in the original that you want to use as shadow threshold. The slider adjusts
to show the point you set, and the result adjusts to the change. The point
you set becomes the darkest point in the image. Colors darker than this
point are reset to this level.
Tip: To work with a specific area of the image, click the zoom tool and then
click the area you want. Use the grabber to move the original image around if
necessary.
56 Chapter 4
Highlight dropper
Zoom
Shadow dropper
Grabber