Canon DC40 Instruction Manual page 112

You can press ( ) to transfer the images, instead of the button. With
[ ALL IMAGES], [ NEW IMAGES] or [ TRANSFER ORDERS], a
confirmation message appears. Select [OK] and press ( ).
When the camcorder is connected to the computer and the image selection
screen is displayed, press the MENU button to return to the transfer menu.
Even when still images recorded on the disc are correctly transferred to the
computer, they will still be marked as images not yet transferred ("NEW
IMAGES").
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