Hello there, @chris tilby!
It seems that you've created a duplicate post about this query. Rest assured, this was answered by my colleague, @IamjuViel, and she provided the steps on how to fix it. Here's the link for faster navigation:
https://quickbooks.intuit.com/learn-support/en-us/other-questions/item-list-stuck-in-flat-view/00/22...
Stay safe!
