Avision AM7100N (MT-0904B) - Manual (Page 45)

Paper Orientation
Place your A4 or LTR paper vertically on the glass with the text facing down and
align it with the A4 or LTR marks.
Document
Glass
If your paper is larger than LTR or A4, for example, LGL or A3, place your paper
horizontally with text facing down and align it with the LGL or A3 marks.
Document
Glass
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