Taxiway Hold Points

[707FAN]

I have been looking at the .AFX files for some of the airports to learn how the airport editor works. Most is fairly straight forward but I can not see how to highlight the hold points on a taxiway/runway entry point. I have read both the single player and multiplayer manuals and both talk about knot properties. OK. When I open a taxiway with the editor with a hold point on it, I see nothing in the knot specifications to indicate the hold point is one direction etc.

Obviously I am missing something here. Can someone please point me in the right direction as I would like to change some of the holding points to be more specific in their operation. i.e directional and add some if needed.

Kev M