If you want to edit text content on a scanned PDF, have a try with PDFelement. The program performs OCR on scanned PDF file automatically to make the text editable. After that, you can edit the PDF text freely as you like.

youtu.be/Y_2cNyh147U

Also you can do with PDFelement:
Change text & images and modify the pages of PDF;
Convert PDF files to Word, Excel, Image, Text and more;
Create PDF files with Word, Text, PowerPoint, Image, etc.