Focus+Context merge overview, detail into single window fisheye views [Furnas 86], [Sarkar et al 94] nonlinear magnification [Keahey 96] [Manojit Sarkar and Marc H. Brown. Graphical Fisheye Views, CACM 37(12):73-84, Dec 1994] [Alan Keahey. www.cs.indiana.edu/~tkeahey/research/nlm/nlm.html] 65