Make a compound with "New Value" inputs?

[Chris_TC]

I am using a Build Array inside a compound, and I want to be able to add new values from outside the compound. If I expose "Value 1" from the Build Array I only get a single port. I want the "New (Value1)" thing that makes additional ports upon request.

A factory compound with this functionality is for example "Merge Polygon Data". But I don't know how to replicate the behavior.

[Hirazi Blue]

Not meant as an RTFM, but because it's pretty well explained there:
Go to the subsection "Defining Multi-Instance Input Ports" of this page in the User's Guide

[mattmos]

Just as an additional note to that page - I found I needed to create 2 instances of the input port and then ICE would add the option to add new connections like you describe.

[Chris_TC]

Thank you!
I usually go for the manual right away, but I wasn't sure what to search for