The Catalog can contain multiple folders. To add or remove folders, use Add Folder and Remove Folder. Adding folders to the list makes the Catalog start indexing them in the background.
Checkmark a cataloged folder to make ZPS create large previews for the pictures inside it. These are available even when the device with that folder is offline (e.g. a flash stick, USB disk, etc.) Such unavailable files remain listed in the Catalog; you can view their previews and their file information. When a file is unavailable, a cross icon is displayed on its thumbnail.
Use Maximum thumbnail size to set the size at which the thumbnails used in the Browser and Filmstrip are stored.
The Catalog’s index file, its "Index," stores thumbnails and information for your pictures. That makes browsing cataloged pictures faster. Also, the Browser’s Quick Search box only works with cataloged pictures. By default, the Index is stored in your Windows user profile folder. This is usually on the same disk as your Windows installation. To save space on that disk, change the Index location or use the control named Trim index when it reaches this size.
Note that the Index only stores information that is already contained inside your picture files. Therefore, clicking Delete the Index does not destroy your data – it only slows down browsing and prevents Quick Search.
Use the setting named For Quick Search ("fulltext"), assume I'm