This feature request is in response to a Lightroom Forum discussion concerning scanner image file processing titled “How can I export images from Lightroom 4, without changing Resolution?” The general advice given was "First and foremost Lightroom is software designed to process raw files from digital cameras." But Lightroom has evolved with many new features since its introduction in 2007 and with Lightroom 5 we now have an application that is well-suited for processing not only digital camera images, but also scanner image files. Document, photograph, and even film scanning are used in many commercial business and creative environments and show no sign of being replaced anytime soon.Lightroom is a cost-effective and time-efficient alternative to Photoshop for editing, organizing, cataloging and archiving digital camera image files all within one-application. With a few additions Lightroom’s capabilities can be expanded to fully accommodate scanner image files. These changes need not make Lightroom more difficult for users who only process digital camera images, since they won’t be available unless selected by the user. The requested changes can be implemented to retain full compatibility with previous versions. The specific request is 'How can I export images from Lightroom 4, without changing Resolution,' but why is that necessary? Scanner image files contain the actual physical dimensions of the captured negative, transparency, photograph, or other 2D document. This file metadata information allows accurate display and print of photograph and other paper document scan image files at a specific target ppi in their actual life-size dimensions. For film scan images it provides a record of the original negative or transparency dimensions enabling identification of the camera format size (i.e. 35mm, 2 1/4, 4x5, 8x10, etc.). This information is required for archival purposes and allows creating and applying Lightroom Develop presets designed for specific film types.In order to accommodate this request LR needs to have the ability to read and use the image file's EXIF 'Resolution' metadata in the Export module 'Imaging Sizing' panel. I suggest the following changes to enable processing scanner image files in Lightroom without the need to use Photoshop simply to retain the original EXIF 'Resolution' and 'Dimensions' during export.SUGGESTED CHANGES1) Add ability to read the image file’s EXIF ‘Resolution’ and display the value in the Metadata panel in ppi or ppcm. Camera raw image files should not display a ‘Resolution’ value to be consistent with Adobe Bridge.2) Add display of the image file’s EXIF ‘Resolution’ metadata field in the ‘Grid View and ‘Loupe View’ info fields using pixel dimensions (5616 x 3744 @ 72 ppi) and in/cm dimensions (78.0” x 52.0” @ 72 ppi). Camera raw image files should display only the pixel resolution values (5616 x 3744) to be consistent with Adobe Bridge.3) Add ability to sort by the image file EXIF ‘Resolution’ and LR ‘Megapixels’ values in the Filter Bar. (NOTE: The current Grid and Loupe view info provide for display of ‘Megapixels,’ but not filtering.)4) Add an option checkbox to the Export module ‘Image Sizing’ panel titled ‘Use EXIF Resolution.’ When this option is selected the EXIF ‘Resolution’ metadata value for each image file should be automatically entered into the ‘Image Sizing’ ‘Resolution’ box. The ‘Resolution’ box should be grayed-out to indicate it cannot be changed. When the ‘Use EXIF Resolution’ checkbox is unselected the “last used” value should appear as it does currently.5) Add the ability in the Export module ‘Image Sizing’ panel for “scaling” the image size by a percentage, such as 50% for creating scan images files that are “exactly” 1/2 life-size. The ppi value entered in the ‘Resolution:’ field should be maintained. If the ‘Use EXIF Resolution’ option is selected both the image ‘Dimensions’ (pixels) and ‘Resolution’ (ppi) should be scaled to preserve the original “life-size” image dimensions in inches or centimeters. This allows maintaining the actual size of scanned media such as film, pictures and other 2D objects in the scaled exported image file metadata. The “scaling” feature can be added to the current ‘Image Sizing’ mode-selector as a new item titled ‘Scale (%).’ The manual entry box below the selector should appear with the “last used value” and % value designator.It would also be helpful if the image ‘Color Profile’ and ‘Bit Depth’ metadata values could be added for display in the ‘Grid View’ and ‘Loupe View’ Info and in the Filter Bar for sorting. Camera raw image files should display ‘Untagged’ for the ‘Color Profile’ to be consistent with Adobe Bridge. This would eliminate the need to use an external application like Adobe Bridge for simply reading and sorting by these values.Thank you for your considerate attention.