Even if the position and color of the vertices of the graph do not matter in the representation model, they can be very useful for the user.


A vertex is moved by dragging its box with the mouse. Another way to place vertices is to run an automatic arrangement with the layout algorithms.

horizontal tree layout

vertical tree layout


A dynamic force directed layout is also provided:



The default color of the concept types can be changed using Tools/Options/CoGui/Appearance command:


A different color can be selected  for each concept type. Contextual menu of the vertex propose a  sub-menu 'Coloring':


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