Weird enough, If you want to put some comments or highlight some text using the acrobat pdf reader, you have no access by default. what you have to do is install a PDF Acrobat Professional, and enable the commenting access explicitly. what a Pain? how about those PDFS we just downloaded from internet, we don’t control the file generation process.
So here is the thing, Acrobat Reader does support commenting and highlighting, you can the tools are there.
After some research, I found the Xchange Viewer, which has the free version and pretty powerful and have all the features to comment and highlight. No need to change the Comment Privilege any more.
Download Here, http://www.tracker-software.com/product/downloads chose the PDF Xchange Viewer.
enjoy your reading and commenting now with Xchange PDF viewer. Also it uses the standard PDF api, so when you save the commented PDF, you can open it use the standard acrobat pdf reader. and the comment is there also.
more FREE tools for application developers and system administrators.