Here you can add your own waypoints, such as farm strips, to the main list.
If you already have a file with a set of waypoints, you can import this directly, without having to enter them manually. It has to be in one of the formats that TpSelect knows about.
When importing, TpSelect checks each waypoint and ignores any that have the same ident as a BGA turning point. It also warns if a waypoint is close (< 1Km) to a BGA turning point, giving the option to include or ignore it.
Once you have finished, click on OK to return to the main dialog, then check the box to include your own waypoints in the selection. They are, of course, subject to the same range and boundary limits as the BGA turning points.