Aggregate time signature barlines join braced staves?

I’m transcribing a piano piece that appears to be 4/4 + 3/4. I would like the dashed barlines to join both staves, rather than appear on each staff only. Is this possible?

I fear the answer is no… I had the same need couple of weeks ago and couldn’t solve it :frowning: BUT you can dash ordinary barlines so it’s possible to work around it, just more laborious :slight_smile: