Hi Ron,
Sounds a bit strange. Can you take some screenshots?
For an existing distributed port group, you should just be able to right click on the port group > Edit Settings > VLAN and set the VLAN ID in here.
When creating a new distributed port group, the option to set the VLAN is on the Configure Settings section of the wizard in the GUI:
Cheers, Matt.
VCP6-DCV | VCAP6-DCV Deploy
@mattallford
If you found my answers useful, please help me by marking them as Helpful or Correct!