Now you can thank others for photos they add to your frame! To say thanks, wave your hand upwards in front of your frame to see information about the photo displayed, like where it was taken and who contributed it to your frame. Then swipe up again to send thanks to the person who added the photo. They'll get a notification in the app letting them know you love it.
If you're not near a frame you can also send thanks from the Aura App. First tap on a photo to view it in full screen. Then click on the icon in the lower left corner to view display options and tap "Thank."