Accessibility and keyboard use

• Keyboard navigation — move between controls with Tab / Shift+Tab, activate buttons and switches with Enter or Space. Focused controls show a clear focus ring.
• Labelled for screen readers — screens, sections, switches, progress bars, and the exchange status pill carry accessible labels. The active-screen title is announced, and the Active jobs list is a live region that announces progress.
• Search where it helps — the Settings screen has a Search settings… box.
• Readable status — job statuses and the exchange state use text labels alongside colour, so meaning never depends on colour alone.

The PDF Organizer page grid and PDF Fill and Sign placement canvas are pointer-driven — page selection, drag-to-reorder, and placing a signature all need a mouse or touch.