Creating recipient list

Hi,

I am going through the link https://wiki.sdn.sap.com/wiki/display/PLM/2.RecipientManagement - Recipient Management . I couldn't able to understand how to create recipient list.

Does I need to do anything in the customization for this ?

I opened a Doc. info record in CV02N ... Environment document distribution- recipient list - create. Recipient list field came-- I didn't get

1. Choose a recipient type, for example, Office user.

2. The initial screen for your chosen recipient type appears and you can create/maintain the appropriate master record.

Can you help in this.

Regards,

Sai Krishna