need help with PDF
 

i have a textbook scanned as images and saved as a PDF file.
how can i "highlight" and add my own notes to the images??
they're not texts, so the usual highlighting doesn't work, and the pop-up note is too small to see on the image :/

The feature you require is annotation, and PdfXchange Viewer has that feature. Read more here on this review:

http://www.techsupportalert.com/best...pdf-reader.htm