Wgraph:Demo arrow color

• Normally an edge will have a solid black arrow of size 10.
• Normally an edge will have no back_arrow;
  this means that for the back_arrow: style = none, size = 0, color = black
• To show a back_edge you must change its style and its size and optionally its color
• To reverse an edge you can use kind=back or the back_edge command; you can (but should not for reasons of clarity) use the back_ attributes for back_edges or together with kind=back

{{#wgraph:svg|thumb=50|wgl|

 edge     A B {}
 edge     A C { arrow_color red                           }
 edge     A D { arrow_color #44ff99                       }
 edge     E F { back_arrow_color orange                   } /* will have no effect! */
 edge     G H { back_arrow_size 10 back_arrow_style solid }
 edge     I J { back_arrow_size 10 back_arrow_style solid back_arrow_color orange }
 backedge K L {}
 backedge M N { arrow_color orange                        }
 edge     O P { arrow_color orange kind back              }

 // you should avoid definitions like the following:
 backedge Q R { back_arrow_size 10 back_arrow_style solid back_arrow_color orange }

}}