Dell C3765dnf Color Laser Printer - Manual (Page 91)

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7 After confirming that the guides are securely adjusted, insert the tray into the printer.
NOTE: If the front side of the tray is extended, the tray protrudes when it is inserted into the printer.
8 On the touch panel, select Size.
9 Select
until the desired paper size appears, and then select the desired paper size.
10 Select Type.
11 Select
until the desired paper type appears, and then select the desired paper size.
12 Select OK.