This lesson shows how you can substitute a Smart Preview from Lightroom when you don't have access to an original image. Then, in Photoshop, you can use a Linked Smart Object to use that Smart Preview as a placeholder for the full resolution raw file. Once you have access to the original file, then your layered Photoshop file can update to swap the low resolution Smart Preview for the original raw file.
NOTE: Some Windows users have reported issues accessing the video playback controls. While we're working on the issue, here's a Temporary Workaround: Click "Introduction" in the table of contents to the right of the video and then immediately click within the video to give it focus. After doing so, use the spacebar to play/pause the video and the left/right arrow keys to scrub forward or backward within the video.
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