Cant get highlight to work

Followed instructions, but the mouse icon never changes and I can't select any text.

Hi,

not all visible text in PDFs is actually "real" text, sometimes it is just an image of text, which means it can't be edited like text and highlighting also won't work. If you have the OCR module, you can use this to turn images of text into real text, afterwards the highlighting should work.

Best regards

Robin