Costs and markets lead engineering teams to collaborate from different location all over the world. Modelling tools are present in development processes to produce complex software and these tools had to be highly collaborative to permit teams to be productive. For that, teams need information about others and their activities. Currently, the tools are mainly web-based, this is the observed trend in every phase of software development, because it does not require any installation and configuration, but they do not give enough information. This paper will present awareness, which is an answer to the information needed during collaboration, and through a scenario we will see how to answer to awareness questions in UML Case Tools.