Datalogic Scanning I GD4100 - Manual (Page 183)

Code 39
Product Reference Guide 181
Code 39 — cont.
Code 39 Set Length 1 — cont.
ENTER/EXIT PROGRAMMING MODE
Select Code 39 Set Length 1 Setting
Make a mistake? Scan the CANCEL barcode to abort and
not save the entry string. You can then start again at the
beginning.
CANCEL
DEFAULT 02 = Length 1 is 2 Characters