First step is to turn on your controller, connect it to your device and turn on your drone. Open the DJI GO App. Once you have a connection, click the top right hand corner to go settings and scroll down and look for advance settings and click it. Look for “Multiple Flight Mode” and enable it.
To access this mode, the drone must be in the air. You need to move the top right switch of your Phantom 3 Standard controller all the way down and you will see an icon on the left hand side of your device that shows that the multiple flight mode is enabled. Click the icon that appears directly to the left, now all you have to do is pick the Intelligent Flight Mode that suits your purpose.