Choose an English voice and reading speed.
Use Tab and Shift+Tab to move through controls, Enter or Space to activate buttons, and Escape to close a tool panel. Expand opens this viewer full screen; Escape returns to the page. The PDF supports text selection, search and links. PDF scripts are disabled.
Reading tools become available after the PDF loads. Text-based PDFs can supply a text view automatically; scanned PDFs need OCR or a reviewed reading version.
Reading view preserves the published HTML structure. Listen is a reading aid and does not replace a screen reader. Scanned pages and inaccessible source documents require remediation.