Jorgen's site has several tools to edit styles in a way not available on the instrument, such as half-bar fills, different time signatures within a style, to name only a few.

http://www.jososoft.dk/yamaha/

At one time, needing to edit and store a "special" style was a pain, but, today's arrangers have vastly increased on-board storage, it is no longer an issue.

Many thanks to Jorgen, and all the others, who have made these tools available for free.

Ian