For macOS and iOS
Beginning with iOS 7 it is pretty easy to add the fonts Chords and Scales to your iPad/iPhone and use them in Pages, Keynote and other eligible apps such as Graphic, PDF Expert and Pixelmator to name a few.
Adding neck diagrams to PDF lead sheets on the iPad
It comes in handy that quite a few PDF reader apps for iOS let you annotate text notes and hence Chords and Scales neck diagrams to your PDF lead sheets.
- open a PDF lead sheet in an eligible PDF reader app
- reveal the annotation toolbar and add text notes to the pdf
- choose the font families Chords and Scales and select font size and font color
- create chord diagrams, scale diagrams, arpeggio diagrams or blank diagrams direct in the pdf document
- tap Done