Avid has just released Sibelius 8.4. In addition to numerous bug fixes and improvements, this update introduces a new Custom Staff Sizes feature. There are now four staff sizes for you to choose among, defined in the Engraving Rules > Staves dialog. There are also finer controls relating to staff size to be found in the Engraving Rules dialog. Navigate through Appearance > Engraving Rules > Staves, and you’ll find a new Staff Sizes table, allowing you to edit each individual size.
It’s also possible to define a default size for your instrument as part of the instrument definition itself. This, along with the settings you choose in Engraving Rules, is stored in the House Style, meaning you can easily export a standard set of staff size settings and apply them across your scores for a consistent look and feel.
The new update also adds support for custom staff sizes on both MusicXML import and export, meaning that if you work with other notation programs, you can now expect even more consistent results, requiring less manual clean up.
The update is available for free to all Sibelius 8 owners.