If your report includes levels with different currencies, it will by default display data from those levels in the currency for the level. You can change this setting to have the entire report use the corporate currency. Either setting can be overridden by applying individual currency elements onto the report.
To change the default currency for your book:
On the OfficeConnect tab, in the Book group, click Book Properties.
Click the Currency tab.
Select whether you want the book to use level currency or your corporate currency.