I'm using Fm13 Advanced.

 

My solution has a form view of products. The form view has three additional fields that I use to flag products as I scroll through them. Each of these flags is a Yes/No, and each has an accompanying field that is used to indicate the customer number/order number.

 

I cannot figure out, though, how to create a list that would be automatically updated each time I flagged a record- and have the list on the form view. For example, perhaps I flag Product A, then Product C, then Product F. I'd like a list that shows what's been flagged. I've tried various portal combinations, but that's not productive. I've been able to make it work using a new window. 

 

But I wonder if it's possible to list all flagged items and do it in the product form view?

 

 

If you're preparing an Invoice/Order, it might make more sense to to do this from the context of the invoice.

 

Anyway, see if the attached file helps you:

Picker_eos.fmp12.zip