Microtonal notation - arrows up and down

[Luca Danieli]

Hello everybody,

I found out very few about arrows down and up for microtonal notation.

Neither a quick research on the mailing-list has shown many results.

I found the best example of it in the following page but I hoped to find some more information on how to set up arrows down and up.

http://lsr.di.unimi.it/LSR/Search?q=microtonal

Can someone lead me to the right tutorial, if there is any?

Luca