 Sometimes when you're working in our studio, particularly when you're new to it, like I am, you close all and then you can all see the source pane, the editing pane. And I've been struggling to find an easy way to do that to make it visible again. Here is something I just discovered up here. There's a little icon, it's like folders. If you click on that, below and behold, the source pane, the editing pane shows up. Hope this helps.