To create a new Flight Plan simply tap the Add button and select New Site. The next screen will ask you to select where to place the bounds of your flight. If you and your device are where you want your flight to be, simply tap the cross-hair icon to zoom to your location. Additionally, you can search for a location by an address or latitude and longitude. Once you've found the correct location to start your mission planning tap Place to start editing the bounds.
Your survey will be placed as a simple square. To edit the survey;
At any time during the creating of your Flight Plan, you can tap its name to rename it. Once you are satisfied with the bounds tap Confirm to save it.