Canon PIXMA iP2850 - Manual (Page 94)

Be Sure to Make Paper Settings after Loading Paper
If the media type setting is not the one for the loaded paper, printing results may not be satisfactory. After
loading paper, be sure to select the appropriate media type setting for the loaded paper.
Print Results Not Satisfactory
There are various types of paper: paper with special coating on the surface for printing photos with optimal
quality and paper suitable for documents.
Each media type has specific preset settings, such as how ink is used and sprayed, distance from nozzles,
etc., so that you can print on that type with optimal image quality.
This allows you to print with the settings best suited for the loaded media type just by selecting that media
type.
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