Ricoh Printer/Scanner Unit Type 8000 - Manual (Page 121)

Items for Specifying Scan Settings
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C
Press [Custom Size].
D
Specify Original Size (X1 and Y1) using the number keys, and then press
the {q} key.
For example, set X1 to 300 mm and Y1 to 200 mm.
E
Set Start Position (X2 and Y2) to 0 mm, and then press the {q} key.
For example, set X2 and Y2 to 0 mm, and press the {q} key.
F
Specify Scan Area (X3 and Y3) using the number keys, and then press the
{q} key.
For example, set X3 to 300 mm and Y3 to 200 mm.
G
Press [OK].
H
Check Scan Area (X3 and Y3) displayed above [Custom Size], and then press
[OK].