I would find it very useful to have an option to create charts in landscape format. For example, full length fretboard diagrams look squashed from left to right, and although vertical fretboards are an option, text still reads across the page in portrait, which looks incongruous.

If this could be implemented, I would then prefer to see the vertical fretboard tool eliminated and replaced with a multi-purpose fretboard tool which can be aligned in either direction as required.