Canon EOS Rebel SL3 DSLR Camera with 18-55mm Lens (Black) - Manual (Page 398)

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Sending Multiple Selected Images
1
Press < 0 >.
2
Select [Send selected].
3
Select images to send.
z Use the < Y > < Z > keys to select an
image to send, then press < 0 >.
z By pressing the < I > button, you
can select images from a three-image
display. To return to the single-image
display, press the < u > button.
z After selecting the images to send,
press the <
M
> button.