Shift-click is a standard way to select multiple transactions in apps. This would greatly streamline the ability to modify multiple transactions from the filter view of transactions.
I'd like to be able to:
  1. Goto transactions
  2. Enter transaction search filter (e.g. name of vendor)
  3. Click on the first transaction's check box
  4. Shift-click on a transaction further down the list to select all of the inclusive transactions between the first selected transaction and the on shift-clicked
  5. Click the option to batch modify (e.g. Change Category) -- this already works.