Caller ID Image - Nexus 6

  1. From a Home screen, navigate: Apps Apps icon > Photos.
  2. Tap the preferred picture.
  3. Tap the Menu icon Menu (located in the upper-right).
  4. Tap Use as.
  5. Tap Contact photo.
  6. Tap the appropriate contact.
  7. If presented, adjust the crop area of the picture then tap Save (located in the upper-right).