A contact's picture
Any photo on your phone can be a contact picture in Buckets.
A contact uses the picture stored in your phone’s contacts. If there is none, a generic contact icon is shown.
To choose a different picture, open the contact, tap “Choose a picture” and select a photo. Photos showing the contact appear first.
The picture is used only inside Buckets; your phone’s contacts are not changed. To return to the phone’s picture, open “Choose a picture” again and tap the line at the top.