Hello Community,
can someone please help me with this passage or make suggestions:
The piece is in 4/4, at the fermata the piano should play 3 independent “bars” cadenza in a 2/4 meter, the barnumers should not advance.
I tried different approaches with independent 2/4 meter for the piano and a 12:8 tuplet (all hidden) for the 12 eighth notes but could not get the result i needed…
Any help appreciated!
Here you have a snippet of my Dorico file and the manuscript:
I already pre-entered these few bars of music so it’s “just” fiddling around with your magic workaround tricks 

Doricofile t986.zip (633 KB)
Can you not just hide rests on either side (or after) of the forced-duration whole note in a hidden 3/2 or 6/4 bar?
Interesting approach…
But I will also need the barlines and the 2/4 meter, and some space to place it all nicely…
Is there a more native approach, that does not need too much graphical treatment?
As steveparker said, create 2/4 on the piano staves (press Alt-Enter instead of Enter using the popover) and a 3/2 bar for the rest.
If you want the tremolos to play back for the full bar, make a 2:3 tuplet so the whole note fills the whole bar, rather than hiding a rest. (I don’t know why the tuplet bracket stops half way along the 3/2 bar, but you are going to hide it anyway so it doesn’t matter).
Make the fermata in parentheses as text. Copy and paste the characters from the Bravura Text font, here: Browse the glyphs | SMuFL
The attachment is before hiding anything.

You’d also want to add a “bar number change/don’t include” in the second and third 2/4 bars. After those bars use again a 4/4 independent time signature in the piano staves so you can show it there but hide it in the others staves.
Thanks Folks!
You always bring me on new thinking paths!