Location, location, location
It's up to you what data you assign to the Label field. I quite often use it for POV (point of view).
With my 2012 NaNo novel Aide Memoire, though, there is only one POV so I'm using the Label field for the location of each scene.
Setting up the Label field
When you start a new project, the default settings for the Label field are Idea, Notes, Character Notes, Chapter, and...
Split screen option
was #2 on my list of Scrivener Plus Points as it provides such a feeling of control over my content.
From day 1, I've been using split screens for my NaNoWriMo projects and all other projects too. (Back in December 2015, I needed a third editing screen and pulled into play the Quick Reference screen too.)
In October 2016, in the run-up to NaNoWriMo for that year, I wrote my first...