open docuware web configuration --> open the archive --> open dialoges --> open a store dialoge -->
click on a various field --> set it to automatic numbering --> here you can create one or more automatic numbering configurations.
After you have done this you can set the field back to standard an save your actions.
now you should have the configured automatic numbering in the form configuration to chose.
Yes, it is unbelievable complicated, maybe someone else have an easier way to do this?!