# Focus on Apple Aperture  ## Metadata - Author: [[Corey Hilz]] - Full Title: Focus on Apple Aperture - Category: #books ## Highlights - Using Referenced Files helps keep your Aperture Library from becoming too large. It’s important to know that the Vault doesn’t back up referenced photos, only the settings for the photos. ([Location 174](https://readwise.io/to_kindle?action=open&asin=B00BY79JUK&location=174)) - With Referenced Files, you’ll need another method, such as Time Machine, to back up your actual photos (which is just as important as backing up the settings for the photos). ([Location 176](https://readwise.io/to_kindle?action=open&asin=B00BY79JUK&location=176)) - You have the option to back up your photos when you import them, which is a good first step. I recommend you also have a way to update those backup photos. Let’s say you import (and back up) 300 photos, but after editing you decide to keep only 50 of the 300. If you don’t update the backup of your photos, you still have the full 300 photos in the backup. No need to keep those extra 250 photos on your backup hard drive. ([Location 177](https://readwise.io/to_kindle?action=open&asin=B00BY79JUK&location=177)) - Tags: [[orange]] - You can change which is the Master (RAW or JPEG) after importing by going to Photos>Set RAW/JPEG as Master. ([Location 211](https://readwise.io/to_kindle?action=open&asin=B00BY79JUK&location=211)) - One way I use stacks is to group photos I’ve taken for High Dynamic Range (HDR), focus stacking, panoramas, or star trails. For those types of images, I have multiple photos that are combined to create a final image. In the end all I need to see is the final product, but I still want to keep all the individual photos. By using stacks, I can keep the final image with the pieces. I make the finished photo the stack Pick, and if I need to see the rest of the photos, I just open the stack. ([Location 378](https://readwise.io/to_kindle?action=open&asin=B00BY79JUK&location=378))