DroneDeploy does take the picture during the flight if that is what you are asking. You can change the start point only from one end of the flight or other by rotating the flight direction. If you have the most efficient pattern, usually running parallel with the long side of the perimeter, the you can rotate 180 degrees to have it start on the opposite side. I like to set the start point away from me so that it is travelling towards me as it completes the mission. You can also start at any of the waypoints, but it doesn't wrap around to get the ones you skipped.