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5.4.2 Within-staff objects
We have already seen how the commands
\voiceXXX affect the
direction of slurs, ties, fingering and everything else which depends on
the direction of the stems – see Explicitly instantiating voices.
These commands are essential when writing polyphonic music to permit
interweaving melodic lines to be distinguished. But occasionally it may
be necessary to override this automatic behavior. This can be done for
whole sections of music or even for an individual note. The property
which controls this behavior is the
direction property of each
layout object. We first explain what this does, and then introduce a
number of ready-made commands which avoid your having to code explicit
overrides for the more common modifications.
Some layout objects like slurs and ties curve, bend or point
either up or down; others like stems and flags also move to
right or left when they point up or down. This is controlled
direction is set.