Summary: Instead of Hardcoding specific currencies into the Data Formatting section of the Inspector... allow GLOBAL variables to be set as the currency.
Problem: Building Professional Custom Apps... and shipping them to customers world wide in multi-currencies, is painful, and OLD school. Each currency for each field, on each layout, must to be manually adjusted for the correct currency.
Current Hack: People will try to use Global fields, to put the currency symbol on the layout. This might seem like a good idea, but as the leader in providing free starter solutions, I can tell you this is painful, and does not provide the needed level of professional look and feel... needed for a Custom Application.
Scenerio 1: Developer Builds Solution. Changing the solution to use British Pounds, or Euros, takes DAYS of work to manually convert each number field, on each layout and on every report.
Scenerio 2: FileMaker's Own starter solutions either have NO-currency... or are manually intensive... to localize for each region. Savings to FMI Inc would be measurable as well.
Ideal Fix: Allow Global Variables to be set to display the currency. Then the Globals are set in the startup script or otherwise changed by the developer in a dialog.