In Xcode how do I create a new workspace and add 1 project to it so that I can see the project and its files?

Question

In Xcode how do I create a new workspace and add 1 project to it so that I can see the project and its files?

If I just drag in the project, all I can see is the project

Answer 1

As alternative

- Close a project that you are going to add to a workspace
- Open Project Navigator -> Right click -> Add Files to ""...