How do you change it to ensure that the file is properly added?
I copied some files into my project folder. Then in Xcode I clicked on a group and chose "Add files to project...". Then I selected multiple files.
One of the files was added properly - It had an "A" next to it. The other file had a "?" mark next to it.
Why didn't it add properly? What should I do to add it properly? It is a PNG file.