The binder is a very useful organisational tool, but one of the key concepts behind Scrivener is the linking of synopses to documents—and the binder does not show synopses (well, actually, it does show them in tool tips if you hover the mouse over items there, but the binder is more intended as a table of contents). The corkboard, as we have seen, is a good way of viewing and editing the synopses of multiple documents, but not everyone likes corkboards and besides, the corkboard only shows one level of a group’s subdocuments at a time. This is where the outliner comes in: it provides a way of structuring multiple levels of your project at the same time as seeing much of the data associated with your documents.
Click into the upper pane (which should still show the corkboard) so that it receives the focus (its header bar will turn blue), and then click on the “Draft” folder in the binder.  Next, select the “Outliner” segment of the “Group Mode” capsule in the toolbar:

 The upper view will now have turned into an outliner, showing all of the items contained inside the Draft (because that is what we selected in the binder). Click on a disclosure triangle next to one of the folders to reveal the next level of  subdocuments (or Alt-click on a disclosure triangle to open all subfolders inside the folder too, all the way down to the bottom of the hierarchy).
Next, with the outliner still focused, click on “Part 2: Organisation” in the binder. The outliner will now show only the subdocuments of the “Part 2” folder.
Choose which columns appear by clicking on the button in the top-right of the outliner title bar, or via the View > Outliner Columns menu. 

The outliner allows you to edit the titles and synopses of various documents, assign the label or status, set the “Include in Compile”, “Page Break Before” and “Compile As-Is” flags and reorganise documents by dragging them around. You can also view various other meta-data, such as the word and character counts of documents.
By default, when you drag items around you can drop them on other items as well as between them (dropping “on” places the dropped document inside the document it was dropped on, below the other subdocuments). You can also use the Ctrl+Arrow Keys (up, down, left and right) to move documents around–this can be useful when you want a little more accuracy. You can also use these same shortcut keys in the Binder.

We can get rid of the split now. To do so, click on the button in the right of the header bar for this editor:

Once you’ve done that, go to Step 11.