Many programmers will be working on the same programs. Is there a concurrent development option in PanAPT?
Yes, from the PanApt Main Menu select DEV or D - for the Development Facility.
Checkout and Checkin can be done from here.
The Merge (MG) action lets you select the level inputs for the generation of a batch Merge JOB stream. The selection list represents all data sets from the primary levels in which the associated member was found to physically exist.
PanApt Reference Guide, section Development Facility