I think you may have hit on one of the limitations of VT. I have not found an easy way to locating a transaction value.
The best I can come up with, is to use the Display> Daybooks and select the appropriate transaction type, use copy function and paste into an Excel sheet and use Excels Find facility make a note of the number and go back.
Not a great help but if you have a large number of transactions, it is quicker than scrolling through hundreds to find a value manually.