Can different projects use different currencies? 

No. Astravue supports one default currency for the entire workspace. Every project follows it.

What happens to existing cost values when I change the currency? 

The currency label on every cost field updates to the new default. The numeric values themselves are not automatically converted using an exchange rate, so review your figures after switching to make sure they still reflect the correct amounts.

Can I switch the default currency back later? 

Yes. You can change the default currency again at any time, following the same steps.

Where does the currency setting apply? 

Like Operational Hours and Holidays, Currency applies instance-wide, so every project and task in your workspace uses the same default currency.

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