Motorola SYMBOL LS9203 - Manual (Page 80)

Symbol LS9203 Product Reference Guide 5-24
FN1 Substitution
When enabled, this allows replacement of any FN1 characters in an Code 128 or EAN 128 bar code with a Key Category and Key Value
choose by the user (see “FN1 Substitution Values” on page 9).
Enable
*Disable