Dear Rebecca,

I once used the FluxMap add-on in VANTED to visualize metabolic flux changes between different conditions. I used the quality column in the input excel data file to assign a color code (between 0 and -1 corresponding to +100 and -100% fold change, respectively) to the arrows. Probably this can be done for other shapes too, when you assign an individual identifier. The legend color gradient (0 to -1) can be chosen in program. But maybe there is a more convenient way.

Best,

Michael