VISUALIZATION TOOL

The visualize() action and the visualize.pl tool generate GML files. 
They are best viewed using yEd Graph Editor available for free at 
(http://www.yworks.com/en/products_yed_download.html).

Using visualize.pl
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perl visualize.pl --bngl BNGL --type contactmap
perl visualize.pl --bngl BNGL --type [ruleviz_pattern|ruleviz_operation]
perl visualize.pl --bngl BNGL --type regulatory [--background] [--groups [--collapse]]

For additional help, try:
perl visualize.pl --help