2. What is metadata?- Data about data Photo metadata is data about your photo. Metadata contains information about your photo such as capture date, ISO, shutter speed, color profile, size and other camera settings. Within Lightroom, Aperture or other editing software you can add additional metadata such as copyrights, model releases, titles, identity of creator, keywords, flags, etc. There are different standards for metadata JPEG, TIFF, PSD, Raw and several other file formats can contain IPTC-IIM, IPTC Core, IPTC Extension, PLUS, Exif and Dublin Core metadata.
3. Metadata can control what image looks like Lightroom doesn’t change images. This makes Lightroom a non-destructive editing software. Metadata can be added to change the way images are displayed. Certain metadata instructs Lightroom how to interpret development settings such as cropping and white balance. Lightroom by default saves the metadata that controls how image is displayed in Lightroom catalog file. This makes all development settings made in Lightroom very reliant on the Lightroom catalog.
4. Why save metadata to file Saves most development settings to the image file making the files less intertwined with the Lightroom catalog. If the catalog becomes corrupted or lost, most metadata and development settings will be saved within the image file. Because most information is saved in the file and not the Lightroom catalog, you images are more forward compatible. This means that if you choose to leave Lightroom in the future, most of your development settings will not be lost. However, this doesn’t mean they will look exactly the same especially in RAW formats. Better chance that when you open the image in another program such as Photoshop that your development settings from Lightroom will appear.
5. How to save metadata to file Backup all images and your Lightroom image catalog Make sure your computer is plugged in and other memory intensive programs are not running. There is a small but real risk that if your computer crashes during the saving process that your images may be damaged. Further minimize this small risk by making sure your computer is in a stable state. Select all photos that have been modified in anyway in Lightroon. Select Metadata > Save Metadata to File (Ctrl + S) Depending on how many images were selected, this process can take a while.
6. You metadata has been saved! Your images are now further protected again Lightroom catalog crashes and losses. And your images are more forward compatible.