FUJITSU fi-6130 - Manual (Page 83)

The [Advance] dialog box appears.
5. Select a color you want to remove, from the [Dropout Color] drop-down list under [More].
For example, when you want to obtain only black text image from a document containing black text outlined in green,
select [Green] from the list.
If you want no color to be dropped out, select [None].