While viewing your Tasks screen, tap the Menu Key to access the following:
Sync now: Tap to sync your Microsoft Exchange account tasks.
Sort by: Tap to select Due date, Priority, or Creation order.
Delete: Tap to select tasks to delete.
View completed tasks: Tap to view your list of completed tasks.
Lists to display: Tap to select which lists to display.
Settings: Tap to change your Tasks settings including Notifications, Notification sound, Vibrate, Pop-up notification, and Accounts.