Canon mg6850 series Online Manual page 566

For details:
Using Useful Display Functions
D. Settings
Tap to display the Settings screen.
You can change the settings of page size, media type, and print quality and so on.
For more on the setting items:
Setting Items for Photo Printing Using Operation Panel
E. Zooming in
Tap to zoom in on the photo.
For details:
Using Useful Display Functions
F. Date specification
Tap to select photo with specifying the date (last modified date of data).
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