TreeJuxtaposer

keep root, landmark locations visible
move from local F+C to global F+C
rubber sheet with borders tacked down
guaranteed visibility
[demo]

 

[TreeJuxtaposer: Scalable Tree Comparison using Focus+Context with Guaranteed Visibility. 
Munzner et al. SIGGRAPH 2003. http://www.cs.ubc.ca/~tmm/papers/tj]

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