One of the appealing aspects of the BlackBerry is that it’s customizable to your needs. BlackBerry themes allow you to adjust the layout and appearance of the icons and applications on the screen. Each BlackBerry comes equipped with several themes. You can also download themes from the Internet for greater variety.
Step 1: Access the BlackBerry applications screen. An easy way to do this is by pressing the "Menu" button, which is the button to the immediate left of the trackball that has the BlackBerry logo imprinted on it.