I am working on a TB file to gather information about contacts and clients. As you will see in the attached screen capture, the note remains “untitled” even though I set the Display Expression as $FullName. I am not sure what I am doing wrong, but I intended to set the note title to match the name of the person.
The prototype also includes a set of rules to populate the subtitle and the note’s badge.
$DisplayExpression does not change $Name, it changes what is displayed instead of $Name in maps, outlines and other views. So, in your example, your note is displayed correctly in the map in your screenshot – in other words, $FullName is shown rather than $Name in that note on the map.
The string “untitled” appears above the key attributes table because that is where $Name is displayed. In other words, you have no errors – Tinderbox is working as designed. If you want something other than “untitled” to show above the KA list, then change the value of $Name.