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+100 into the field next to the slider; the numbers represent percentage
values.
4. (Optional.) If necessary, click the Reset button to undo all color balance
adjustments made to the image using the sliders during this visit to this
tab. (The Undo button reverses only the last slider change while this
Reset button will undo all slider changes you’ve made since entering
this tab.)
5. (Optional.) Click the Levels & Curves tab for more advanced tools for
adjusting color. On this tab, the Before and After versions of the image
work as described just above for the Color Balance tab.