1. Camera's Wi-Fi is set to [Enable] If [Built-in wireless settings]'s [Wi-Fi/NFC] is set to [Enable] under [ Connecting the Camera to a Computer using a USB Cable (EOS 5D Mark IV).
One Shot AF release priority – This option controls whether the camera will prioritize the fastest possible shutter release or correct focus when the camera is focusing on stationary subjects in One-Shot AF mode. There are also settings for controlling lenses with electronic M -focus feature, and whether to enable or disable the AF- assist beam feature on an attached Speedlite.