First, you need to download the reader manual to the following LINK and print the pages on which the barcodes of configuration you will need are present.
Regarding the enabling of ITF coding, the procedure is explained in the following White Page: Datalogic QuickScan L QD2300: HOW TO read Interleaved 2of5 (ITF 2of5)
To enable code 32 you need to scan the barcode "Enable Convert Code 39 to Code 32" at page 113.