Adjacent to the display, you'll find a new LV button, which, as you may have guessed, launches the new realtime display mode.

ENGADGET: New Leica M camera has live-view and 1080p video capture, we go hands-on (video)

Companion apps are nothing new, but while they can serve up bonus material for a TV show or medal counts for the Olympics, they can't see exactly what you're watching and display relevant information in realtime.

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