I can’t select or copy text in a PDF file

Some PDF files require you to enter a password before you can select or copy text. Ask the person who gave you the document for that password.

To enter the password for a PDF file, choose File > Password.

If the Password command is disabled, this document does not require you to enter one. Make sure you’ve selected the Text tool by choosing Tools > Text. If you still cannot select text, the PDF is probably a scanned PDF, which does not contain any text but rather an image that may look like text.