We propose a set of layout operations ensuring flexible and convenient interactive editing of communication diagrams and nested entity-relationship models having textual labels on connections. The set includes several procedures for incremental diagram layout. Tools for fully automatic layout and for direct manual painting of graphic primitives are also integrated in a single system. In this way we have filled to some extent the gap between both extremal levels of editing.
 

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Layout Algorithms of Graph-Like Diagrams for GRADE Windows Graphic Editors P. Kikusts, P. Rucevskis, Proc. of Graph Drawing ’95, Lecture Notes in Computer Science, vol. 1027, 1996, pp. 361–364.

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