Focus Mode has 3 different settings.
Moving the cursor to a different paragraph will make it the active paragraph.
Editor 
From word count to estimated reading time, document stats help you stay on top of things.
Shut down distractions. Focus on the sentence or paragraph you’re currently working on.
From Library navigation to enabling core features, the Titlebar is your go-to.
Formatting options at your fingertips make writing on mobile a breeze.
A simple key-value format for storing additional information about a document, only visible in the Editor.
Knowing keyboard shortcuts will greatly improve your performance with our app.
A more structured view of your document will help you improve your writing style.
A personal editor-in-chief on your device, carefully reviewing your text for redundancies, clichés, and filler words.
How to install additional spellchecking (Windows)
Snippets allow you to save a significant amount of time by providing smart text substitutions. (Windows only)
On iPhone, enable Focus Mode from A
The active sentence is highlighted and surrounding text is dimmed.
The active paragraph is highlighted. Surrounding text is dimmed.
Moving the cursor to a different paragraph will bring that paragraph into focus.
Cursor remains vertically centered in the Editor when typing or moving up or down in your document. 
When enabled the active sentence is highlighted and surrounding text is dimmed. 
Focus Mode has 2 different settings and a scrolling option.
Moving the cursor to a different paragraph will make it the active paragraph.
Typewriter Scrolling can be enabled independently of other Focus Mode or