Although Apple’s new iCloud Photo Library feature remains in beta at this point, iOS 8 still packs in a few nice little photo management features. One of the lesser-known of these is that you can now actually hide photos from showing up in your main timeline in the Photos app.
To do this, simply tap-and-hold on a photo — either in the thumbnail or full-screen views — and a context menu will appear with a “Hide” option. Tapping “Hide” brings up a confirmation, explaining that the photo will be hidden from the “Moments, Collections, and Years” views, but still be shown in any albums that it’s been explicitly placed into, as well as the Camera Roll.
If you’re using iCloud Photo Library, the hidden status will also sync across all of your iOS devices, removing the photo from your timeline on all of them.
Once you’ve hidden at least one photo, a new “Hidden” smart album will also appear in the Albums list, giving you quick access to any photos you’ve hidden. Unhiding a photo is done in the same manner as hiding a photo — tap and hold on the photo you want to unhide, and the context menu will show the “Unhide” option.