On the Home screen, tap one of the 5 big cards: Scan with Camera, Sign a PDF, Password Protect, PDF Converter or Extract Text (OCR).
Tap Choose files and select all the files you need (you can select several at once).
Choose the Language of the text (Urdu + English, English, Arabic, Hindi, Bengali and many more).
Choose Searchable PDF.
Tap the big purple Start button and wait a few seconds.
The first time, the reading engine downloads once, so it can take a minute. Always check the text for mistakes, especially numbers and names.
When you see Done!, tap Download. The new file is saved on your phone or computer.