A wheel step over the workspace background (tab row, margins) pushes the tab row (notes, to-dos, hashtags) out at the top so the note fills the area, like the Kanban bar; note and sidebar keep scrolling only themselves. In focus mode the header and the folder sidebar can be pinned; the header's shadow is lighter. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>