Canon EOS REBEL T7I Wi-Fi (Wireless Communication) Function Instruction Manual page 72

Sending Images to the Other Camera
With a Wi-Fi connection established, a picture cannot be taken even if

the camera's shutter button is pressed.
To terminate the Wi-Fi connection during image transfer, select [Cancel]
on the camera, then terminate the Wi-Fi connection.
RAW images cannot be sent.

When sending a large number of images or large files (total size), make

sure to check the remaining battery level.
Depending on the functionality of the target camera, the movie files will

be converted when they are sent. Therefore, transfer may take longer
than usual.
You can select up to 999 files at a time.

When you reduce the image size, all images to be sent at the same time

are resized. Note that movies and b size still photos are not reduced.
[Resize:S2] is enabled only for still photos shot with cameras of the

same model as this camera. Still photos shot with other models are sent
without resizing.
You can cancel the image transfer by selecting [Cancel] during the

transfer. When [Cancel] is selected on the camera sending the images,
the image selection screen will reappear. When [Cancel] is selected on
the camera receiving the images, the connection will be terminated.
With a Wi-Fi connection established, the camera's auto power off does

not function.
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