Canon EOS REBEL T8i Advanced User's Manual page 439

Caution
If you print an image with a large image size using the [Index] or [Both] setting
( ), the index print may not be printed with certain printers. In this case, resize the
image ( ), then print the index print.
Even if [Date] and [File No.] are set to [On], the date or file number may not be
imprinted, depending on the print type setting and printer.
With [Index] prints, the [Date] and [File No.] cannot both be set to [On] at the same
time.
When printing with DPOF, use the card for which print order specifications are set.
You cannot print in the specified print order if you extract just the images from the
card for printing.
Certain DPOF-compliant printers and photofinishers may not be able to print the
images as you specified. When using a printer, refer to the printer's instruction
manual. When requesting service from a photofinisher, ask in advance.
Do not use this camera to configure print settings for images with DPOF settings
set up on another camera. All the print orders may be overwritten inadvertently.
Also, the print order may not be possible, depending on the image type.
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