multirests on and off Ctrl+Shift+M or M. rest to split below. Creating a multirest is the same as creating lots of single bar rests: choose Create Bar Other; type in the Number of bars you want, click OK, then click where you want to put the multirest.
How do you make a Tacet in Sibelius?
In the Edit Text dialog, type the instrument's name (“Flute 3” in the example). Then, add a few lines and type “TACET”. You can make the word bigger by selecting it and adjusting its size in Text > Size.
How do you put bars together in Sibelius?
To add bars to your score, simply choose Create > Bar > At End (shortcut Command-B or Ctrl+B; hold it down to add lots of bars at once). To add a page to your score, just add extra bars, and Sibelius will automatically create a new page when necessary.