Waypoint Flight Planning

I took everyone's advice and tried the waypoint planning with a BT mouse and it was WAY easier. Thank you all for that. my next question is I planned a 2-mile flight path running at 200 feet and 15 mph. When the waypoints switch direction, the flight path arcs, naturally, I am assuming due to flight speed. I want to try a cornfield-type route making a 90/180 turn at the end of the row and then back to the next row. Aside from the sweep at the end of the row, is there a better way to do this? Also, if it could be of help, I cant post the path I made already with every variable but I can write it down and take a picture of the path and then what I wrote down if that will be of help?