How do I make the section after adding 9/8 automatically have an additional rest, and

[tonton5]

How do I make the section after adding 9/8 automatically have an additional rest, and cannot be combined with the next section?
thanks~~

[Derrek]

One could use the SHIFT + B popover to add three eighth notes (3e) to a measure at the location of the caret.

One can also activate Insert mode before adding the time signature.

[tonton5]

Thanks for your help~