Focus+Context: TreeJuxtaposer

stretch and squish "rubber sheet"
guaranteed visibility
keeping highlighted marks visible at all times
[demo]

 

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

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