How do I allocate a new dataset in ISPF?

Need a PDS for my practice COBOL. Someone said 3.2. I got to a panel and froze. What fields matter?

Option 3.2, choose Allocate. Dataset name like YOURID.COBOL.SOURCE. For a PDS set Directory blocks > 0 (say 20). RECFM=FB LRECL=80 for source. SPACE in tracks is fine for practice.

If SMS is in play, the panel may ask for DATACLAS instead of unit. Follow whatever your training ID sheet says.

Got a PDS allocated. Creating members next. Thanks.