To maximize the photo-viewing experience on your phone:

  1. Since most photos are shown in landscape mode, rotate your phone

  2. Tap in the upper right corner to play accompanying music.

  3. Temporarily hide the browser toolbar on the iPhone:

    1. Tap
    2. Then ...
    3. Then Hide Toolbar
  4. When available, mirror (or 'cast') your iPhone onto a wide-screen TV:
    1. Open Control Center on your iPhone.
    2. Tap the Screen Mirroring button, then choose your Apple TV or an AirPlay 2-enabled smart TV as the playback destination.
    3. If an AirPlay passcode appears on the TV screen, enter the passcode on your iPhone.
    4. To switch back to iPhone, open Control Center, tap the Screen Mirroring button, then tap Stop Mirroring.