Canon EOS R10 User Manual page 664

(1) Sending images individually
1.
Select an image to send.
2.
Select [Send img shown].
Turn the < > dial to select an image to send, then press the <
button.
Images can be selected by touch from index display (
In [Size to send], you can select the image sending size.
When sending movies, you can select the image quality of movies to
send in [Quality to send].
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