Optimized Big buttons Simple In simple mode only basic functionality will be available from the main screen. Result is rounded up to 5 digits. Engineer In engineer mode special functions will be used on the main screen. Result is is not rounded and is presented in engineer notation. Start wizard Tap button once to use value located in the center Drag from the center of the button up to use function in the upper right corner Drag from the center of the button to the left to use function to the left Drag from the center of the button down to use function in the bottom right corner