Xerox Paris, a document system Support & Software Mode D'Emploi

The Input Filter lists all possible byte values (Input Characters) in decimal
notation from 000 to 255 on the left hand side of the dialogue.

On the right hand side, the settings for the currently selected Input Character
will be displayed.

Any given Input Character is modified by selecting the character from the
decimal list on the left. The character’s current settings will be displayed on the
right and are available for modification.

Under the ‘Character’ setting the basic function of the selected character can be
defined.

In the majority of cases a character will be only one of the following :
bypassed, printed

 or used as a line delimiter

.