Copying files in Xcode

Question

I've created some files in Xcode. Now I want to copy some of them. How should I do that?

Currently, I copy them in Finder & copy those back into Xcode in order to work on them. There must be a better way.

Answer 1

I think (not on my Mac at the moment so this may be totally wrong) that "Add files to project" has an option for copying the files from their source location. At least, I recall doing this at some stage.

Answer 2

Right click -> show in finder -> select file in finder -> right click -> select "Duplicate" menu

Edit: Previous answer was wrong, fixed in comments, thus the downvotes. Fixed now though.