STEP import assembly tree

Hello,
I'm on SW 2024 and when I import an assembly I would like it to be in the form of a tree and not imported with the multitude of parts that compose it.
Which parameter should I check?
Thank you in advance for your help

Hello,
You have to play around with this setting:
image
If the imported WWTP was saved in assembly mode, you will be able to retrieve it with the names of each subassembly and part.
Have a nice day.

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I think the assembly was not saved in assembly mode. I have enabled this option and I still have the parts imported instead of the subsets.
Thank you for your answer.