Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 461)

3.
Set the options as desired.
Set [ Print type ], [ Date ], and [ File No. ] options.
Print type
Standard Prints one image on one sheet.
Index
Multiple thumbnail images are printed
on one sheet.
Both
Prints both the standard and index
prints.
Date
On
[ On ] imprints the recorded date of the captured
image.
Off
File No.
On
[ On ] imprints the file number.
Off
4.
Exit the setting.
Press the < > button.
Next, select [ Sel.Image ] or [ Multiple ] to specify the images to be
printed.
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