LilyPond Internals Reference: 3.2.9 balloon-interface

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A collection of routines to put text balloons around an object.

annotation-balloon (boolean): Print the balloon around an annotation.
annotation-line (boolean): Print the line from an annotation to the grob that it annotates.
padding (dimension, in staff space): Add this much extra space between objects that are next to each other.
text (markup): Text markup. See Formatting text.
text-alignment-X (number): How to align an annotation horizontally.
text-alignment-Y (number): How to align an annotation vertically.
thickness (number): For grobs made up of lines, this is the thickness of the line. For slurs and ties, this is the distance between the two arcs of the curve’s outline at its thickest point, not counting the diameter of the virtual “pen” that draws the arcs. This property is expressed as a multiple of the current staff-line thickness (i.e., the visual output is influenced by changes to Staff.StaffSymbol.thickness).
X-attachment (number): Horizontal attachment of a line on a frame, typically between -1 (left) and 1 (right).
Y-attachment (number): Vertical attachment of a line on a frame, typically between -1 (down) and 1 (up).

spanner-placement (direction): The place of an annotation on a spanner. LEFT is for the first spanner, and RIGHT is for the last. CENTER will place it on the broken spanner that falls closest to the center of the length of the entire spanner, although this behavior is unpredictable in situations with lots of rhythmic diversity. For predictable results, use LEFT and RIGHT.

This grob interface is used in the following graphical object(s): BalloonText and Footnote.

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