I’d like to have a time signature of 11/8 be followed by (3+4+4/8), is this possible? Thanks.
In the shift-M popover, I typed /8 (3+4+4/8), which displayed as 11/8 (11/8) at first, but setting this property fixes it:
Note that the square brackets around  force the first part to display as 11/8; otherwise with this property set you would see 4+4+3/8.
By the way, this will mean that beam grouping is not going to follow the 3+4+4 pattern. To solve this, enter an invisible time signature of [3+4+4]/8 in the second bar, and manually adjust beaming in the first bar.
Thanks a lot, that’s exactly what I wanted.