How do you reset the alarm system after changing a battery in a 1997 Subaru Legacy?

To reset the alarm system after changing the battery in a 1997 Subaru Legacy, first ensure that the new battery is properly installed and securely connected. Then, lock and unlock the driver's side door using the key or the remote. If the alarm remains active, you may need to turn the ignition to the "ON" position (without starting the engine) and leave it for about 10 minutes. This should reset the alarm system.