#### 3.17.1 Balloon help

Elements of notation can be marked and named with the help of a square balloon. The primary purpose of this feature is to explain notation.

The following example demonstrates its use.

>          \context Voice
>          \applyoutput
>             #(add-balloon-text 'NoteHead "heads, or tails?"
>              '(1 . -3))
>          c8

The function `add-balloon-text` takes the name of a grob, the label to print and where to put the label relative to the object. In the above example, the text “heads or tails?” ends 3 spaces below the `balloon.'

##### See also

Program reference: text-balloon-interface.

Examples: input/regression/balloon.ly.

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