Lightroom Auto Sync: HOW to use it. Wow. I've been using Lightroom for a long time, but I didn't know that - you can enable automatic synchronization of settings, so that when you make changes to images in a series, you can jump between these images and make changes, but these are applied to all images. Very practical if you want a consistent look for a series of images, but you need to experiment with all the images to see what that look will be.