This is the report (slides) of the working group "Navigation in large
graphs". Graphs from social sciences and bioinformatics are often 
so large that it is difficult to handle them. Given a large graph with
multilevel clustering, we developed an algorithm to navigate through
the graph by means of an overview and a detail view. The layout of
the detail view is calculated on the fly when the corresponding region 
becomes visible the first time, and is kept to have a consistent view 
when the user moved the detail view back to a region already seen. 
This leads to a partial layout algorithm that respects already known 
area placements of clusters.