Click on the drop down menu and choose the currency of your preference. This preference is saved; when you log in next time you'll view all companies in this currency. To change your view again just use the drop down arrow.
We support five different currencies: USD, CAD, Euro, GBP, and JPY. You can also look at a stock in its Filing Currency.
The items on a company's balance sheet and income statements are also viewable as % ages if you are on the "Financials" Tab; click on Common Size %.