Pull down the File menu, choose "Save as," and add "-ocr. pdf" to the file name. Pull down the Document menu, point to "OCR Text Recognition," and then point to "Recognize Text Using OCR…" and "start" The OCR process will start.

Where is the OCR option in PDF?

All you have to do is open the scanned document or image that you'd like to OCR, then click the blue Tools button in the top right of the toolbar. In that sidebar, select the Recognize Text tab, then click the In This File button. You'll now get some options to tweak your OCR.

How can you tell if a PDF is OCR?

If the text is in there as an image, it cannot be searched. Text can be searched only if it is present really as text. OCR is how you add an additional text layer to a PDF that contains the words as an image. Thus, a file that has been OCR-ed will contain words, and one that hasn't will not.