I have a number of utility functions/extensions in a .swift file at a central location. In Xcode 15, I used to be able to Add File... and uncheck the box that said COPY. The project would then have a REFERENCE to the file. I could make changes to the shared file and all projects that referenced that file would see the latest version.
I don't see how to do that in Xcode 16. Add File... opens a dialog and the only options (in a drop-down) are Copy and Move -- neither of which I want to do.
How do you make a reference in Xcode 16?