The S60 5th Edition SDK emulator by default starts in the keypadless mode. However, you can turn on the keypad by clicking the "Keypad on" button on the emulator.
In Keypad off mode the emulator has keys in the bottom part.
The leftmost key is used for call key. This key is short cut for Main Menu>>logs>>Recent calls>>Dialled numbers. The middle key is used to open the main menu. The right most key is used to come back to home screen or idle screen from any opened application.These keys are not available in the keypad on mode.