Canon MG8100 series On-Screen Manual page 502

You can print the displayed photo by touching the Color button while the slide show pauses.
Note
You can change the print settings by touching the right Function button while the slide show
pauses.
Setting Items
To resume the slide show, touch the OK button while the slide show pauses.
You can resume the slide show by touching the right Function button while printing. If the
printing is not complete, you can print the displayed photo by pausing the slide show again and
touching the Color button.
To cancel the slide show, touch the HOME button.
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