Fujitsu FI-5950 Operator's Manual page 167

HINT
ATTENTION
156 8.9 Page Edge Filler (Automatic Page Size Detection)
The "Automatic Page Size Detection" setting can be configured on the scan-
ner driver setting window.
For details, refer to the scanner driver's Help.
Note that if the Page Edge Filler is too wide, some characters in the vicinity
of the boundary may be cut.
When you scan the document based on the other settings than "Automatic
Page Size Detection", "Page Edge Filler (ADF)" automatically becomes
valid instead of this setting.