Canon EOS 5D Mark IV L-series Zoom Lens Kit Owner's Manual

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The basic operation for using the camera’s wireless functions is 
explained here. Follow the procedures below.
1
Select [Communication settings].
Press the <M> button, select 
[Communication settings] under the 
[54] tab, and press <0>.
2
Select [Built-in wireless settings].
3
Select [Wi-Fi/NFC].
4
Select [Enable].
When a nickname (for 
identification) is not registered, a 
registration screen is displayed. 
See page 16 to register a nickname.
[Wi-Fi function] is now selectable.
Basic Operation and Settings
You can operate wireless functions also by touching the camera’s screen.