Adobe Photoshop Lightroom CC - Manual (Page 156)

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Processing and developing photos
Last updated 4/20/2015
View Before and After photos
You can compare two versions of a photo as you apply Develop settings to it. The Before view first displays the photo
as it was originally imported, including any presets that were applied. The photo remains unchanged unless you copy
settings to it. The After view shows changes as you make them. Zooming and panning are synchronized in the two
views.
• To switch the Before and After views one at a time in Loupe view, press the backslash (\ ) key or choose View >
Before/After > Before Only. The word “Before” appears in the lower-right of the image.
• To display the Before and After photos in two views together, click the Before And After Views button on the toolbar
to toggle through the choices or choose an option from the pop-up menu.
Before/After Left/Right : Displays two whole versions of the photo in two views, side-by-side on the screen.
Before/After Left/Right Split : Displays two halves of the photo split into two views, side-by-side on the screen.
Before/After Top/Bottom : Displays two whole versions of the photo in two views, one on top of the other.
Before/After Top/Bottom Split : Displays two halves of the photo split into two views, one on top of the other.
Copy settings to the Before or After version of a photo
When you are working in a Before and After view of your photo, you can apply the settings of one version to the other,
and vice versa.
• In the toolbar, click the Copy Settings From The Before Photo To The After Photo button.
• In the toolbar, click the Copy Settings From The After Photo To The Before Photo button.
• Click Swap Before And After Settings.
• Choose Settings > Copy After’s Settings To Before.
• Choose Settings > Copy Before’s Settings To After.
• Choose Settings > Swap Before And After Settings.
Note: These menu commands are also available when you’re viewing Before and After versions of your photo in Loupe view.
All of the current settings for one version are copied to the other version. To copy a single history setting, right-click
(Windows) or Control-click (Mac OS) a state in the History panel and choose Copy History Step Settings To Before.
Editing HDR images
In Lightroom 4.1 or later, you can import and work with 16-, 24-, and 32-bit floating point images--often referred to as
HDR (high dynamic range images.) You can use the Develop module controls to edit HDR images, and then render the
images for export or printing as 8-bit or 16-bit images. Lightroom imports TIFF and DNG format HDR images. Make
sure the images are in process version 2012. (See
Process versions .)
The Develop module Exposure control has an expanded range when working with HDR images (+10 to -10).
Lightroom imports HDR images, but does not assemble them. To assemble a 32-bit image, you can choose the images
in the Library and then edit them in Photoshop. Make sure to save the HDR files as a 32-bit TIFF. See
Merge photos to
HDR in Photoshop .
Set your Lightroom preferences to save files edited in Photoshop as Tiff . Choose Lightroom > Preferences (Mac) or Edit
> Preferences (Windows). In the External Editing section under Edit in Adobe Photoshop , choose Tiff for File
Format. The of Photoshop may vary based on the version of Adobe Photoshop installed.
For more information about HDR images, see High dynamic range images in Photoshop help.