29,9 - puts input positions 29-37 in output positions 1-9.
129,2 - puts input positions 129-130 in output positions 10-11.
61,1 - puts input position 61 in output position 12.
88,8,PD,EDIT=(TTTTTTTTTTTTTTT) - converts the 8-byte PD value in positions 88-95 to a 15-digit value with leading zeros (e.g. '00001234567890') in output positions 13-27.
and so on.
If you're not familiar with DFSORT and DFSORT's ICETOOL, I'd suggest reading through "z/OS DFSORT: Getting Started". It's an excellent tutorial, with lots of examples, that will show you how to use DFSORT, DFSORT's ICETOOL and DFSORT Symbols. You can access it online, along with all of the other DFSORT books, from: