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Jansi Thiyagarajan, Jan Aerts (KU Leuven, Leuven, Belgium)Phylogenetic tree visualization is a common need of researchers, in the area of computational biology and molecular evolution, to make sense of evolutionary data. Over the last few years, the size of the biological data has increased significantly; most importantly the alignment data. There are numerous software packages and tools available to visualize phylogenetic trees, however, they are generally good for visualizing the trees with few thousand nodes or less than that. Moreover the existing tools lack in producing scalable and interactive visualization that fits within the display area, for data with over thousands of nodes. Other problem with existing tools is the use of common techniques like scrolling, zooming, etc., when the tree doesn’t fit within the display space; with this approach the user easily get lost and further it hinders the information gain as there is no or little information on the overall structure of the tree. To address the issue of scalability and to interact with more information, we propose Focus+Context approach to build scalable and interactive visualization of phylogenetic trees. This approach displays the focus seamlessly while providing globa