How to change "Document extension" in XCode 4 after creating a project?

Question

In my document-based project I left the 'Document extension' field default, and can't figure out where to change it now. Would I only be able to do it programmatically now?

Answer 1

The document file type extension is specified in your Info plist. You can either edit it directly, or edit your target, which includes select Info.plist properties—including the document types list—in its editor.