Keep RAW photos: this can be helpful if your library has RAW and JPG versions of the same photo imported side by side.Keep photos that belong to an album: if you have some photos included in albums in your library, and others that don’t belong to any album, this rule will prefer keeping the copies of the photos that are part of an album and getting rid of those that aren’t.This is useful if you have some duplicates that have been scaled down from the original, so you can keep the largest copy and get rid of the smaller ones. Keep the largest duplicate: compares the file size of each duplicate photo and keeps whichever one is the largest.Keep favorite photos: if you have marked any photos in your library as a “Favorite”, the marked photo will be chosen as the keeper, and other photos as nonkeepers.If you want to create a custom rule, a good place to start might be by duplicating this rule and making your own adjustments to fit your collection. It prefers to keep favorited photos, edited photos, HEIF over JPG, larger photos over smaller ones, photos that belong to albums, and photos that have been assigned keywords. Keep PowerPhotos recommendations: this is a good default rule that should work well for most setups.In the duplicate browser, you will see a checkmark above whichever photo from each group has been chosen as the keeper.
![powerphotos duplicates filter size match powerphotos duplicates filter size match](https://www.myexcelonline.com/wp-content/uploads/2017/09/Remove-Duplicates-Using-Power-Query-or-Get-Transform.png)
Once a rule has been chosen from the pop-up menu, PowerPhotos will evaluate all the duplicate groups based on that rule. You can choose from several built-in duplicate rules using the pop-up menu down at the bottom of the window.
![powerphotos duplicates filter size match powerphotos duplicates filter size match](https://doctorduplicator.com/wp-content/uploads/2018/05/find-duplicates-768x595.jpg)
The keeper will typically be the one photo that you want to keep around, with the rest of the duplicates getting moved to the trash, or having some other action performed on them. PowerPhotos uses a rule-based system to choose a keeper from each group of duplicate photos.