If there are photos and videos that you don't want anymore, you can delete one at a time, or several. Following are processes how you delete single as well as multiple photos from your iCloud Photo library
Delete one photo
- Select the photo that you want to delete.
- Press the Delete key.
- Confirm that you want to delete the photo.
Delete multiple photos
- Press and hold the Command key.
- Select the photos that you want to delete.
- Press the Delete key.
- Confirm that you want to delete the photos.
When you delete a photo, it goes into your Recently Deleted album, where it stays for 30 days. If you use iCloud Photo Library, the photos that you delete are moved into the Recently Deleted album on your other devices too. After 30 days, Photos deletes the photos permanently. You can permanently delete photos right away when you click Delete All in the Recently Deleted album.
Note: When you delete photos directly from an album by pressing the Delete key, you only remove them from the album and not your entire photo collection. If you want to delete photos from both the album and your collection, press Command-Delete.