A tutorial on how to encode text directions in **kern data.
Text directions
Text can be displayed in the graphical notation by adding a text layout direction to the encoding:
Text layout comments start with !LO:TX: and are placed immediately before the note
to which they are attached. The parameter a means place the text above, and b means
place the text below. The font is roman by default; adding an i parameter will
make the text italic, and b to make it bold. The actual text is given by the
t parameter, such as “cresc.” with the parameter t=cresc.. Note that parameters
are separated by colons, and : is used to insert a colon into the text string.