Run fixup → then re-run Recognize Text .
Acrobat will highlight "suspect" words. You can type the correct word directly over the image-text and click Application-Level Troubleshooting adobe acrobat dc ocr fix
If you copy text from an OCR'd PDF and it pastes as random symbols, the font encoding is likely broken. : Re-run the OCR using the Recognize Text tool with the "Searchable Image" setting. Run fixup → then re-run Recognize Text
Remember: If the built-in Adobe engine gives up, you still have options (ABBYY, Google Drive, or Tesseract). Don't throw away that old scan just yet. you still have options (ABBYY