1. If you want to view a PDF file in pure text mode, tap "Tool" (Three-dots icon) at the top bar.
2. Tap the "Text Reflow" icon under “Viewer” at the menu and you will see the PDF file displayed in text form.
3. At the bottom menu of Text Reflow mode, you will see the options of Settings/Auto Scroll/Search.
4. Tap “Settings” to change PDF Reader (Viewer Mode, Time Interval, Jump Space, Tap Move).