Adobe Photoshop Lightroom CC - Manual (Page 175)

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Processing and developing photos
Last updated 4/20/2015
Clear or undo a crop or straighten adjustment
❖ Click Reset in the Crop Overlay tool drawer.
Rotate or flip a photo in the Develop module
• To rotate a photo in 90-degree increments, choose Photo > Rotate Left or Rotate Right. To rotate a photo to less than
90 degrees, see Straighten a photo . The photo rotates in a clockwise or counterclockwise direction around its center
point.
• To flip a photo horizontally from front to back so that you’re looking at a mirror image, choose Photo > Flip
Horizontal. Objects that appeared on the left side appear on the right side, and vice versa. Text in the photo will show
in reversed mirror image.
• To flip a photo vertically from front to back so that you’re looking at a mirror image upside down, choose Photo >
Flip Vertical.
Sharpening and noise reduction
Sharpen a photo
You sharpen photos at two stages in the Lightroom workflow: as you view and edit photos, and when you print or
export them. Sharpening is part of the camera default that Lightroom automatically applies to your photos.
When Lightroom exports, prints, or rasterizes a photo for editing in an external editor, the sharpen setting for the image
is applied to the rendered file.
1 In the Develop module, zoom in on the photo to at least 100%.
2 Drag in the Navigator panel to see an area of the photo that highlights the effect of the sharpening adjustment.
3 In the Detail panel, adjust any of the following Sharpening settings:
Amount Adjusts edge definition. Increase the Amount value to increase sharpening. A value of zero (0) turns off
sharpening. In general, set Amount to a lower value for cleaner images. The adjustment locates pixels that differ
from surrounding pixels based on the threshold you specify and increases the pixels’ contrast by the amount you
specify.
Radius Adjusts the size of the details that sharpening is applied to. Photos with very fine details may need a lower
radius setting. Photos with larger details may be able to use a larger radius. Using too large a radius generally results
in unnatural-looking results.
Detail Adjusts how much high-frequency information is sharpened in the image and how much the sharpening
process emphasizes edges. Lower settings primarily sharpen edges to remove blurring. Higher values are useful for
making the textures in the image more pronounced.
Masking Controls an edge mask. With a setting of zero (0), everything in the image receives the same amount of
sharpening. With a setting of 100, sharpening is mostly restricted to those areas near the strongest edges.
Press Alt (Windows) or Option (Mac OS) while dragging a slider to see the areas being affected (white) versus the areas
masked out (black).
To turn off sharpening, set the Amount slider to zero (0) or click the Detail panel On/Off icon .