Getting a custom field on Mobile App to link to and open another screen

I have a custom field on the Invoices and Memos screen that is a link to the Sales Order if the invoice is linked to a Sales Order.  Works great on the UI.  However, when I added the field to the AR301000 screen on the mobile app, there was no link.  I scoured the net and could not find the secret.

I finally DID find something in the Acumatica documentation that solved the issue.

This is the single line I needed to add to my code to get it to work:

update screen AR301000 {
  update container "InvoiceSummary"  {
    containerActionsToExpand = 3
    fieldsToShow = 11
    add recordAction "PrintInvoice" {
          redirect = True
    }
    add field "SOOrderNbr" {
      displayName = "Sales Order Nbr"
      special = "AllowEdit"
    }
  }
}

FYI, PrintInvoice action is a VS action to be able to print the Invoice/Credit memo.  

A BIG shout out to ​@dcomerford and ​@DipakNilkanth for helping through my Mobile App growing pains.