I don't know if this was broken recently or has never worked. But in a report of expenditures by category, you can double-click an amount in any category and it zooms to the transactions that make up that amount. Then you can double click any of those entries and it will take you to that entry in the register. For investment acounts, this does not work. It does zoom to the view of the individual transactions. But from there a double click just brings up the edit dialog - instead of going to that entry in the investment account register.