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I see now sense to show show 'Element Navigation' dialog if there is only one diagram but located in different sections: for example scoped and present. It only adds extra clicks for users and affect usability. reproducible with 070515 steps 1: 1. open design center 2. expand Design Center|DesignPatternCatalog|GoF Design Patterns|Creatioonal' 3. double click on Abstract Factory collaboration node Element Navigation dialog appears, and there are two choices, user can choose from 'Creational::Abstract Factory::AbstractFactory' diagram and 'Creational::Abstract Factory::AbstractFactory' diagram but located within different sections, I see no reason for the dialog in this case. steps 2: 1. create sequence diagram 2. on the diagram invoke 'Show Interaction Boundary' from context 3. close the diagram 4. double click on interaction node Element Navigation dialog appears.. with no real choice.