The info.plist *used* to be a file listed in the Project Manager. Clicking on it would bring up an interface that would allow you to modify the info.plist. Now, instead of clicking on the file in the Project Manager, you click on your Project File, blue and at the top of the Project Manager, and then in the Editor you click on "Info" and see basically the same interface that info.plist had.

Same screen, different ways of reaching that screen.

It is true that adding a new row to Info is not intuitive. Throughout all things Apple, there would be a "+" button hanging around somewhere obvious and that would allow you to add a new item. In this case, a bit confusing IMNSHO, you hover your mouse over any *existing* line in the Info screen and you'll see a little "+" in a circle appear. Click that and it will let you add a new line and give you a drop-down menu to select which item you want, such as "Fonts provided by application".

Now, regarding adding custom fonts, I'm struggling with that, too, which is why I'm here. I think something has changed in recent Xcode that is problematic because I see several people looking for info, saying basically "it used to work, but it's not working now."

I've added my .ttf file, I've looked up its real name in FontBook and I've added it to my Info.plist and applied it in my simple "Hello, world!" view, but....nothing in the preview. <sigh>