I'm new to using Xcode. When I started using Xcode a couple of weeks ago I had a file list to the left and had three tabs open for different files. I'm not sure if that was a default setting or not.
This morning there was an update to iTunes. I could not update it without closing Xcode. Before if I opened a new tab it would open the same file that was in the other tab. All I had to do was open a new file and it would open in the active tab. Now when I open files they open in a new window.
I have done online searches but they are for previous versions of Xcode.
How do I set up my preferences where a file list displays to the left as before and open files in new tabs instead of new windows?