3 Using Catalogs
Because it’s essentially a database, Lightroom’s catalog can speedily handle thousands of images without hogging your whole hard drive. That also enables you to do most of your editing work even when your images are stored on a disconnected hard drive or disc.
If you are upgrading from an earlier version of Lightroom, see “To import catalogs from previous versions of Lightroom” later in this chapter. If you’re starting fresh with version 3, Lightroom automatically creates a new catalog the first time you import any photos, as explained in the “Importing Images” introduction ...
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