How do I activate the On-screen keyboard on my Nokia N900 device?

The on-screen virtual keyboard is not activated by default. To active the on-screen keyboard, tap the Application menu icon, and select Settings > Text input and select Use virtual keyboard check box. Remember to save the changes before exiting. When you have activated the virtual keyboard, tap any text entry field and the text input area appears on the touch screen and displays one of the keyboards.Note! When the integrated keyboard is in use, the virtual keyboard is disabled.