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The process version is the Camera Raw technology
that Lightroom uses to adjust and render photos in the Develop module.
Depending on which process version you use, different options and
settings are available to you in the Develop module.
- Process Version 2012
- Images edited for the first time in Lightroom 4
use process version 2012. PV2012 offers new tone controls and new
tone-mapping algorithms for high-contrast images. With PV2012, you
can adjust Highlights, Shadows, Whites, Blacks, Exposure, and Contrast
in the Basic panel. You can also apply local corrections for white
balance (Temp and Tint), Highlights, Shadows, Noise, and Moiré.
- Process Version 2010
- Images edited in Lightroom 3 used PV2010 by default. PV2010
offers improved sharpening and noise-reduction from the previous process
version, PV2003.
- Process Version 2003
- The original processing engine, used by Lightroom 1 and 2.
If the photo you are editing uses PV2010 or PV2003, an exclamation
point icon  appears
in the lower-right corner of the image preview. You can take advantage
of the newer technology by updating the process version.
 If you’re not sure which process version your
image uses, open the Camera Calibration panel and look at the Process
menu. To update a photo to PV2012, do any of the following
in the Develop module:
Click the Update To Current
Process 2012 button in the
lower-right corner of the photo.
Choose Settings > Process > 2012
(Current).
In the Camera Calibration panel, choose Process >
2012 (Current).
If the Update Process Version dialog box appears, select
any of the following
- Review Changes Via Before/After
- Opens the updated photo in a Before/After view so you can
inspect the changes. See View Before and After photos.
- Update
- Updates the one selected photo.
- Update All Selected Photos
- Updates all photos currently selected in the Filmstrip, not
just the active photo.
- Update All Filmstrip Photos
- Updates all photos in the Filmstrip, not just the one that
is selected.
Important: Updating
to Process Version 2012 may incur significant visual changes
to your photos. It’s a good idea to update images one at a time
until you are familiar with the new processing technology.
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