Do I need to explain ?

Ok…
When?
Do I need to explain ?
Thanks

Not completely sure what you are asking for but if I understand it right I would say it is already possible with frames.
I use this to insert dialog in musicals.
Is this what you mean?
Edit: Or could it be that you are asking for a “one click” solution?

What teacue says. Illustration to show how you need to set the frame dropdowns.

For an “easy” way, you’ll need to wait for the next update - this is coming! See Coda indent - #18 by hamhm3 - Dorico - Steinberg Forums

Thanks all,
for examples and information.
Alain