Craving an application for your Storm but can’t find a version working for it? If you want to use a third-party application that was not designed for the BlackBerry Storm smartphone touch screen, you can turn on Compatibility Mode.
Compatibility Mode is designed to

• Restrict the BlackBerry smartphone to portrait view while you are using the third-party application
• Imitate trackball navigation (for example, if you touch the BlackBerry smartphone screen and slide your finger, this is similar to moving a trackball cursor, or if you click the screen, this is similar to clicking a trackball)

If the third-party application requires a keyboard, the SureType® technology keyboard appears.

To turn on Compatibility Mode for a specific application, complete the following steps:

1. Navigate to the Applications list by clicking Options > Advanced Options > Applications.
2. Locate and select the third-party application.
3. Display the menu and click Enable Compatibility Mode.

Source: BlackBerry

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