Modifying this control will update this page automatically
on your Mac.Double-click a photo or video, then click Edit in the toolbar.
Click Adjust in the toolbar, then click Curves.
Do any of the following:
Automatically correct the curves of a photo or video: Click the pop-up menu below Curves, choose RGB or the color you want to correct, then click Auto.
Manually set the black point, midtones, or white point of the histogram: Click
