What the dial controls
At higher levels, Anasa shows navigation, tabs, toolbars, status information, and the full writing area. As you lower the level, secondary controls fade, then leave the layout, and the text column becomes more focused.
This is not a productivity score and it does not diagnose how you feel. It is simply a fast way to choose how much interface is visible right now.
Accessibility
The levels do not remove the note itself. Reduced-motion preferences are respected on the website, and the desktop controls remain available through keyboard commands. If a level hides something you need, return to a higher level; the choice is yours, not automatic enforcement.