Canon BJC-620 - Manual (Page 41)

z When a sheet of film has dried completely, cover its printed side with a
sheet of plain (not coated) paper before storing it; this is recommended
even if you place the sheets of film in a clear file.
For best results when printing on special papers, follow the instructions that
come with the paper.
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You use the manual feed function when printing on heavier-weight print media
(24 lb to 28 lb or 91 g/m2 to 105 g/m2) or high gloss film.
To manually feed a single sheet, follow these steps:
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z The POWER, ON LINE, and PRINT MODE lights are on.
3DSHU +DQGOLQJ Chapter 3