Adobe Photoshop Lightroom CC - Manual (Page 195)

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Processing and developing photos
Last updated 4/20/2015
• Right-click (Windows) or Control-click (Mac OS) a state and choose Copy History Step Settings To Before to copy
a single adjustment.
• Click the Clear All button (the X) on the History panel header to remove all states from the listing.
When the list of states gets too long in the History panel, create snapshots of the states you want to keep. Then, clear the
panel by clicking the Clear All button. This removes the list of states without affecting the current image settings.
More Help topics
Adjust overall image tonal scale
Apply local adjustments
Sharpening and noise reduction
Adjust the tonal scale using the histogram
Set print color management
Undo image adjustments
Copy settings to the Before or After version of a photo