Sony DSC-RX100M3 - Manual (Page 18)

If you slide the viewfinder pop-up switch when the power is off, the camera turns on.
12. Hook for strap
13. (N mark)
Touch the mark when you connect the camera to a smartphone equipped with the
NFC function.
NFC (Near Field Communication) is an international standard of the short-range
wireless communication technology.
14. Control ring
15. Lens
16. Eye sensor
17. (Flash pop-up) switch
18. Monitor
You can adjust the monitor to an easily viewable angle and shoot from any position.
19. Light sensor
20. For shooting: Fn (Function) button
For viewing: (Send to Smartphone) button
You can display the screen for [Send to Smartphone] by pressing this button.
21. MOVIE (Movie) button
22. Multi/Micro USB Terminal
Supports Micro USB compatible device.
23. HDMI micro jack