How do I create a custom form?

That’s generally the case, but it depends how you got there. For example, if you were in the details screen of a record 20 or 30 rows deep, then did a Show New Screen → This Item from there, then that’s the row where your User Specific Column values will go. What I’ll often do is open my custom form on top of a completely separate table - a table that has just a single row. Then collect all my form data in that row, before writing a new row to the destination table when the user submits. This keeps things nice and clean.

What’s the purpose of this counter? Sounds like it has nothing to do with the custom form?

Again, I think I need to understand better what you’re using this counter for…

So you’re wanting some sort of unique incrementing number?
A word of warning… down this path there be dragons :wink:

Have a read through this thread… (all of it)

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