As shipped, the pd_def.mac file contains the string:

This causes all new geometry created during your Creo Elements/Direct Drafting session to be automatically included in the zone (i.e., the PD_ZONE info is added to all new geometry). You can turn off the auto-inclusion feature at startup by removing this line from pd_def.mac. To turn off auto-inclusion from within Creo Elements/Direct Drafting, you could type in:

Note that these functions will not affect geometry input from an MI file. If the contents of an MI file were in the zone when they were saved to the file, they will be put into the zone when the file is restored. If the contents were not in the zone when the file was created, they are not placed into the zone when the file is restored.