In the object settings you can set any object to ...
Unfortunately you can pick specific storeys.
I have never tried but possibly you could use REQUEST("Story-info".....) to get all the storey info and set up a parameter list of the storey names of which you could then choose one.
You might need multiple parameters if you want to set more than one individual storey.
Then use REQUEST("Story"........) to get the current storey and if that matches to any of the storey parameters then draw your 2D object.
As I say I have not tried this so this is just a theory.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11