In Xcode how do I get files to open in the same window

I'm running XCode 3.2, and when I double click on a file in Groups and Files it always opens in a new window. What I'd like is for it to appear in the main Xcode editor. I've tried changes the preferences in the Xcode preference panel without any success.

Solution 1:

Try a single click rather than double click. In the All In One layout (Preferences, General) the editor is a pane in the Xcode window and files will appear there when you merely select them from the list. A double click gives you the file in a separate window.

Solution 2:

If you using Xcode as a new project there should be a button on the right side of the editor toolbar that toggles between Grouped and Ungrouped. When you click that, and open a new file, it will use the same editor window instead of creating a new window for each file.

If you not using Xcode as a new project, and just the editor, trying single clicking.