You can control screen orientation from notification area easily. You also can prevent the other application from changing screen orientation. The following rotation modes are available. - Guard: this application prevents the other application from changing screen orientation. - Auto Rotation: screen orientation is determined by a physical orientation sensor. - Portrait: the screen is in a portrait orientation. - Portrait (Reverse): the screen is in a portrait orientation; the opposite direction from normal portrait. - Portrait (Sensor): the screen is in a portrait orientation, but the sensor is used to change direction. - Landscape: the screen is in a landscape orientation. - Landscape (Reverse): the screen is in a landscape orientation; the opposite direction from normal landscape. - Landscape (Sensor): the screen is in a landscape orientation, but the sensor is used to change direction. * Depending on the device, you may not be able to use several modes. * If \"Guard\" mode is active, you cannot click \"install\" button when you want to install an application. When you want to install an application, you should inactivate \"Guard\" mode or this application.