How to create custom equpment in OBD

Hi Bentley Users,

Knowing that we can create custom equipment/ component in OpenPlant Modeler under Equipment - User Defined - Create Equipment, I am curious if we can create same in OBD. Our project defines to model electrical discipline on OBD. It is having difficulty to put tags & properties for electrical equipment like panels, MCC, transformers. Even though I can do it in OPM, my sub-contractor has only OBD. Thank you. 

Regards, 

Thiha