Read receipts

How do I get read receipts to display in notes 6.0.1? I used to have my notes setup (R5) so that when someone sent a read receipt request it would flag it with an icon I created in the column to the right of where you can put checks in the mailbox. I forgot how to do this. H

Subject: Read receipts

you need to code it in the column formula in the Inbox folder.

@If(ReturnReceipt = “1”; …)