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Smart Previews

  1. Lightroom Classic User Guide
  2. Introduction to Lightroom Classic
    1. What's new in Lightroom Classic
    2. Lightroom Classic system requirements
    3. Lightroom Classic | Common Questions
    4. Lightroom Classic Key Concepts
    5. Lightroom Classic tutorials
    6. Set Preferences for working in Lightroom Classic
    7. Reset Preferences for working in Lightroom Classic
  3. Workspace
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    2. Display the Library on a second monitor
    3. Personalize identity plates and module buttons
    4. Watermark your photos in Lightroom Classic
    5. Color management
  4. Import photos
    1. Specify import options
    2. Set import preferences
    3. Import photos from a camera or card reader
    4. Import photos from a folder on a hard drive
    5. Import photos automatically
    6. Import photos from Photoshop Elements
    7. Import photos from a tethered camera
    8. The Filename Template Editor and Text Template Editor
  5. Organize photos in Lightroom Classic
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    2. Work with photo collections
    3. Group photos into stacks
    4. Flag, label, and rate photos
    5. Use keywords
    6. Metadata basics and actions
    7. Find photos in the catalog
    8. Work with video in Lightroom Classic
    9. Advanced metadata actions
    10. Use the Quick Develop panel
  6. Process and develop photos
    1. Develop module basics
    2. Create panoramas and HDR panoramas
    3. Flat-Field Correction
    4. Correct distorted perspective in photos using Upright
    5. Improve image quality using Enhance
    6. Work with image tone and color
    7. Masking
    8. Apply local adjustments
    9. HDR photo merge
    10. Develop module options
    11. Retouch photos
    12. Cure red eye and pet eye effects
    13. Use the Radial Filter tool
    14. Adjustments with Lens Blur
    15. Edit and Export in HDR
    16. Remove Tool
  7. Viewing photos
    1. View photos
    2. Browse and compare photos
    3. Set Library view options
    4. Share photos for comments and feedback
    5. Smart Previews
  8. Export photos
    1. Export files to disk or CD
    2. Export photos from Lightroom Classic
    3. Publish photos online
    4. Export to hard drive using publish services
    5. Presets for export, and other settings
  9. Work with external editors
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  10. Manage catalogs and files
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    3. Back up a catalog
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    5. Create and manage folders
    6. Manage photos within folders
  11. Maps
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  12. Photo books
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  13. Slideshows
    1. Create slideshows
    2. Slideshow module panels and tools
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    4. Add overlays to slides
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  14. Print photos
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  15. Web galleries
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    5. Preview, export, and upload web photo galleries
  16. Keyboard shortcuts
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  17. Content Authenticity 
    1. Content Authenticity in Lightroom Classic
  18. Lightroom and Adobe services
    1. Creative Cloud Libraries
    2. Using Adobe Stock in Creative Cloud apps
  19. Troubleshooting 
    1. Fixed Issues
    2. Known Issues
  20. Technical Support
    1. Performance Guidelines
      1. Basic troubleshooting steps to fix issues in Lightroom Classic
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      3. Keep Lightroom up to date
      4. Preference file and other file locations | Lightroom Classic
      5. Allow Permissions to Lightroom Classic on macOS
    2.  Technical issues
      1. GPU Issues
        1. Troubleshoot graphics processor (GPU) and graphics driver issues | Lightroom Classic
        2. Lightroom Classic GPU FAQ
      2. Startup Issues
        1. Windows | Lightroom doesn't start
        2. Error: Lightroom catalog cannot be opened
        3. Error: 'Unexpected error opening catalog' occurs in Lightroom after Windows 10 upgrade
        4. "Assertion failed" update error | Windows
        5. Error MSVCR110.dll opening apps in Windows 10
      3. Rendering Issues
        1. Troubleshoot issues with Develop module
      4. Stability Issues
        1. Troubleshoot crash or freeze in Lightroom Classic
      5. Miscellaneous Issues
        1. FAQ | Color in Lightroom Classic
        2. Lightroom desktop and mobile apps unavailable to Education memberships | Kivuto
    3. Workflow Issues
      1. Catalog Issues
        1. Error : Lightroom catalog cannot be opened
        2. Troubleshoot corrupt catalog
        3. Locate missing photos
        4. Recover catalog and images after resetting preferences
        5. Lightroom Classic catalog FAQ
      2. Sync Issues
        1. Lightroom Classic sync FAQ

Importing photographs into your catalog establishes a link between the catalog and the physical file. The photograph can exist on an internal or external drive. In previous versions of Lightroom Classic, you could edit images that were contained on drives connected to Lightroom Classic.

Smart Previews in Lightroom Classic allow you to edit images that are not physically connected to your computer. Smart Preview files are a lightweight, smaller, file format, based on the lossy DNG file format.

Advantages of Smart Previews

  • Smart Previews are much smaller than the original photos. You can free up disk space on devices with smaller storage capacities (for example, SSD drives) by choosing to keep original files on a high-capacity external device (for example, NAS devices or external discs). For example, 500 raw images from a high-end DSLR camera may occupy 14 GB of disk space. The Smart Preview files for the same images amounted to 400 MB of disk space.
  • Continue to work with your Smart Preview files even when the device containing your original photographs is disconnected. You can perform all edits that you would perform on the original file.
  • Automatically sync any edits made on Smart Preview files with your original files, as soon as the device is reconnected to your computer.
  • Once created, your Smart Preview files are always up to date. When your storage device is connected, any edits you make to the original file are applied instantly to the Smart Previews as well.

Create Smart Previews

There are several ways to generate Smart Preview files:

Import

When you import new images into your catalog, select Build Smart Previews (Import dialog > File Handling section). Smart Previews are created for all the images imported into the catalog.

Export

When you export a set of photographs as a catalog, you can choose to build and include Smart Previews in the exported catalog. Click File > Export as Catalog, and then select the  Build/Include Smart Previews checkbox.

On the fly

You can create Smart Preview files on demand. Select the files for which you want Smart Previews, and then click Library > Previews > Build Smart Previews.

Megjegyzés:

Smart Previews are stored in the [Catalog Name] Smart Previews.lrdata file, located in the same folder as the catalog.

Work with Smart Previews

You can identify the Smart Preview status of a photograph based on the information displayed below the Histogram:

Lightroom Classic CC smart previews
Original: You are viewing the original image. No Smart Preview exists for this file.

Lightroom Classic Histogram Smart Preview
Smart Preview: You are viewing a Smart Preview. Lightroom Classic cannot detect the device containing the original file.

Lightroom Classic CC smart previews Histogram Original + Smart Preview
Original + Smart Preview: You are viewing the original file. A corresponding Smart Preview exists.

Lightroom Classic CC Histogram Status icons
Status icons displayed when multiple images are selected in Grid view (G):

A. Originals without Smart Previews B. Originals with Smart Previews C. Smart Previews only (Disconnected from Original) D. Original file missing (normal preview displayed) 

Delete Smart Previews

Do one of the following:

  • In the Library or Develop module, for a photo that has a Smart Preview, click the status Original + Smart Preview below the Histogram, and then click Discard Smart Preview.
  • In Library or Develop module, click Library > Previews > Discard Smart Previews.

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