Apple DVD Studio Pro 4 - Manual (Page 514)

2 Click the pop-up menu for the GPRM you want to partition, then choose the partition
configuration to use from the pop-up menu.
You can choose from the following:
Range of each register Result Partition configuration
0-65535 One 16-bit register 1 Partition
0-255 Two 8-bit registers 2 Partitions
0-15 Four 4-bit registers 4 Partitions
0-3 Eight 2-bit registers 8 Partitions
0-1 Sixteen 1-bit registers 16 Partitions
Note: Any GPRMs that are currently used by a script have their pop-up menus deactivated
and cannot have their partition configuration changed.
514 Chapter 20 Creating Scripts