annotate

abjad.top.annotate.annotate(component, annotation, indicator)

Annotates component with indicator.

Annotates first note in staff:

>>> staff = abjad.Staff("c'4 d' e' f'")
>>> abjad.annotate(staff[0], 'bow_direction', abjad.Down)
>>> abjad.show(staff) 

>>> abjad.inspect(staff[0]).annotation('bow_direction')
Down

>>> abjad.inspect(staff[0]).annotation('bow_fraction') is None
True

>>> abjad.inspect(staff[0]).annotation('bow_fraction', 99)
99

Returns none.