Factorio Forums

The shift-right-click to copy, shift-left-click to paste thing, eg copy recipe between assemblers or circuit network settings between inserters.

It would be awesome if this also did modules. It's a pain to add modules when you're not filling all slots with the same module.

Agree that should be the case. I would recommend to use the copy paste module mod until it's implemented in vanilla.
https://mods.factorio.com/mod/copy-and-paste-modules