The lines in the arena....

Can someone please go over all the lines in the arena for me...?

For example the quarter line and center line and all the other lines. Where are they and what are the other ones?

A diagram, explanation, website or something would be really helpful.

Thanks

www.lilacthymestables.com/arenadiagonalsm.doc

They have a picture of an arena there - centerline goes from A to C through X. (Rider enters at "A" for test, Judge sitss outside of the arena behind "C" as it helps them see how straight you move from A to C.)


Quarterlines are parallel to centerline, between centerline and long sides of the arena.


Diagnol lines can be
Long diagnols are:
H through X to F or M through X to K


Short diagnols are from long side to other long side just shorter distances than the long diagnol, for example: K through L to B, or V through X to R or V to M.