Option to turn off automatic optical character recognition (OCR) completely, not for each individual document.

Every time I would like to edit a document, like insert a text line, the OCR runs and stops me from being able to work on my PDF until it is finished. When I have many pages on a document, it takes a long time and often doesn't recognise the text properly. So I don't want this running automatically. I need an option to turn it off or be able to turn it on for an individual document.