Bob Zawalich has created so many useful plug-ins over the years, so it’s entirely possible to have overlooked one on occasion, like the no-nonsense Respace Clef Change. This handy tool ameliorates the curious situation in which Sibelius stubbornly leaves too much space in bars that contain one or more clef changes:
In Bob’s words:
For all staves, for any bar that contains a clef change, the plugin hides the clef changes, then respaces the bar in all staves, then makes the clef change visible.
You may want to run it separately on the full score and in parts. I recommend running it on the full score first.
After running the plug-in, the result is much more pleasing:
Respace Clef Change is available for download for Sibelius 6 & 7; you can also download it directly through Sibelius 7 from File>Plug-ins>Install Plugins>Engravers’ Tools.