So in geometry, a line segment is written like "AB" with a line above - easy, just use the overline in a span. A ray from A to B would be a right arrow --> above AB. For a line (not a line segment), it's arrows in both directions <-->, again, above the AB. I know it can be done in Latex, and images generated from that, but that method is messy and annoy. This site has done it with images: https://www.varsitytutors.com/hotmath/hotmath_help/topics/lines-segments-rays. I just think there's probably a way to do without resorting to images. This is standard math notation, but I can't find a solution anywhere. (I've been through all the extended symbols, and am happy there's a code for an interrobang....)
So basically, I need a way to stick > or < on the end of an overline. Does that make sense?