Panels & Tabs
This gives you complete control over the layout of your project. Whenever you leave you project, its precise pane configuration is saved and reloaded when you come back to it.
The main file tree itself is a tab within a panel. If you look carefully, you will see that it can receive focus and the Filetree text is in a tab.
As a result, you can perform the exact same set of operations on it as with any other tab content. It can be moved around, removed, reinstated etc.
If you have multiple panels, the panel you click within gets the focus and can be seen by a white border.
If you want to open a file in a different panel, first click on that panel and then open a file from the file tree.
You can add any number of tabs into a single panel. You are also free to drag tabs around to change their order.
Tabs can also be dragged from one panel to another.
Tabs can be created from the View > Panels menu or by using hotkeys. The next section explain the panel actions available.