Your ETZ site will be set to a 'Base Currency' in-line with the main currency for your business. Please refer to the associated article on 'Base Currency' and 'Exchange Rates'.
The currency is set on the Costing’s page of the Assignment Entry as shown in this example:
The example above shows an assignment that has been set to Euros on both the pay and bill rates (example: you could have an assignment where you are billing in Euros and paying in GBP).
All timesheets produced from the assignment will be set to the currency selected and this will apply throughout the payment and billing process, as appropriate.
The following articles may also be useful: