Distributed multiuser hypermedia environments provide not only information sharing mechanisms but also user collaboration/ communication facilities. The provision of integrated views of heterogeneous information resources is necessaryto create common understandingamong the users who are possibly distributed in terms of geographyand time. However, requirements of customization must also be considered since such diverse users would want to personalize views of shared information. In order to integrate views considering requirements of flexible customization, we propose cooperative view mechanisms of Dexter-based hypermedia systems, introducing environmentalobjects and their participation relationships. The mechanisms instantiate deputies of hypermedia on screen using participation relationships of users, hypermedia components, and environments. The relationships are also used for the purpose of supporting awareness. Using a novel user collaboration facility, the relationships are visua...