LabView 6.1 Full Development Version: Compare VIs

[AnjaRB]

I'm working with LabView 6.1 Full Development Version. Why does my collegue who has the same version has a function in LabView which allows him to compare two VIs? What did I do or didn't I do that I can't find this function? (It is not in the menu where it should be.)
Thanks!

[Dennis_Knutson]

He has the Professional version and you only have full. The pro version includes the application builder as well as the comparison tool.