The below links provide tutorials on how to write more advanced elements of GeN.

Ornaments - http://gen.ucoz.net/index/ornaments/0-22

Piano Scripture - http://gen.ucoz.net/index/piano_scripture/0-27

String Exclusive Dynamics - http://gen.ucoz.net/index/string_exclusive_dynamics/0-25

Notation for Percussion - http://gen.ucoz.net/index/notation_for_percussion/0-26

Repetition and Codas - http://gen.ucoz.net/index/repetition_and_codas/0-30

Advanced Accidentals - http://gen.ucoz.net/index/advanced_accidentals/0-32

Keep in mind the syntax _ in the tutorials indicate one blank space.