How do I create a Subassembly?

@SupremeDorian ty lol

@Fyrem0th I'm surprised a comment I made nearly five years ago helped somebody, but you're very welcome and I'm really happy to have helped you :)

@SupremeDorian tysm <3 i’ve somehow been stupid enough to not notice the “create subassembly” in the top left, this helped so much, as i’m making a rocket with slanted engine nozzles for a Starship HLS-esque landing engine system and have had to experiment in subassemblies to do it, but haven’t been able to do it. Thanks again :)

Thanks!

What he said

Drag the thing you want to make into a subassembly into the upper left corner.