By enabling this setting, the home currency can be changed in the main screen and then, from the Set up screen. You will be able to set up a different currency for some of your vendors and customers.
Instructions
To complete the setup, please follow the next steps:
Go to Setup > Settings
In Company Setup section, click on Currency Options link.
A pop-up window will display. There you should validate the home Currency that is displayed by default. The Multicurrency checkbox will appear as uncheck.
Check the Multicurrency checkbox and confirm the following information is displayed.
Check the "I understand I can't undo Multicurrency" option and click on Save button. Once you do this, you won't be able to change your company currency anymore.
Click on Currency Options link again and confirm the window is displayed correctly.
In order to add a new currency (used by your customers and vendors), click on the Add Foreign Currency link and to edit an exchange rate, go to the Actions column and click on Edit. The Add/Edit Foreign Currency window will open, enter the new exchange rate and click on Save to finish.