Canon EOS R Advanced User's Manual page 451

Sending Multiple Selected Images
Connecting to a Smartphone via Wi-Fi
1
Press < 0 >.
2
Select [Send selected].
3
Select images to send.
Press the < Y > < Z > keys or turn
z
the < 5 > dial to select an image to
send, then press < 0 >.
You can press the < 1 > button and
z
turn the < 6 > dial counterclockwise
to switch to the three-image display
to select the images. To return to the
single image display, also press the
< 1 > button and operate the < 6 >
dial.
After selecting the images to send,
z
press the < M > button.
451