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What does the colon followed by number in ArcPro model builder mean?

Question asked by Hornbydd Champion on May 15, 2019
Latest reply on May 15, 2019 by kelly.koenig

I'm hoping someone from ESRI could explain the following as I could find no mention of it in the online help.


In ArcPro whilst building a model some parameters start to mysteriously be numbered. It is not clear why or what their significance is and which one to choose.



If anyone can explain this I would then suggest ESRI add this to the documentation.