Lexmark 4I3 - Manual (Page 185)

Document Insertion Device (F3)
F 3
F3
Clips Top of Form s Device
Bottom of Forms Device F inger G rips
The Document Insertion Device (F3) is available for all models.
The device has an F3 by itself in the upper left corner of the device.
Use this device for printing cut forms for correspondence, individual
invoice forms, and so on.
See “Installing and Using the Document Insertion Device (F3)” on
page 1-88 for information on installing and removing the forms
device, loading and unloading forms, and adjusting the device.
Chapter 3. Getting to Know Your Printer 3-21