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Fig. 1C. —"Auto Levels" in Photoshop (Adobe Systems, Mountain View, CA). "Color Balance" is found under "Image" menu bar (Image Adjustments Color Balance), as shown in left upper corner. Baseline slider bar indicators are set at midline position indicating color level shift of 0 (not shown). Modified "Color Balance" dialogue box is shown in lower left corner. Image midtones have been chosen in "Tone Balance" box. Slider bars for cyan/red, magenta/green, and yellow/blue color levels have been shifted (arrows) to empirically correct color cast. Note change in color levels from 0. Resulting image on right side shows further reduction of green cast and improved exposure of specimen.