This enables the relationship graphs feature where issues are represented by nodes and relationships as links between such nodes. Possible values are ON or OFF. Default is OFF.
This feature requires installing GraphViz (all OSes except Windows) or WinGraphviz (only Windows). Refer to the notes near the top of core/graphviz_api.php and core/relationship_graph_api.php for more information.
Font name and size, as required by Graphviz. If Graphviz fails to run for you, you are probably using a font name that gd PHP extension can't find. On Linux, try the name of the font file without the extension. The default value is 'Arial'.
Font size, default is 8.
Default dependency orientation. If you have issues with lots of children or parents, leave as 'horizontal', otherwise, if you have lots of "chained" issue dependencies, change to 'vertical'. Default is 'horizontal'.
Max depth for relation graphs. This only affects relationship graphs, dependency graphs are drawn to the full depth. The default value is 2.
If set to ON, clicking on an issue on the relationship graph will open the bug view page for that issue, otherwise, will navigate to the relationship graph for that issue.
The full path for the dot tool. The webserver must have execute permission to this program in order to generate relationship graphs. This configuration option is not relevant for Windows. The default value is '/usr/bin/dot'.
The full path for the neato tool. The webserver must have execute permission to this program in order to generate relationship graphs. This configuration option is not relevant for Windows. The default value is '/usr/bin/neato'.