I am currently facing some problem when I tried to import a PDF as a graphic. The PDF with some original text beside was first cropped to remove the text and then imported using \includegraphics.
However, as shown in the figure, the original text remained and could be 'seen' when highlighted (when viewing in PDF reader). In fact, by copying and pasting the text to a word file, the original text could be viewed again.
Anyone know what caused this and maybe the solution for it? (besides converting the PDF to image)