Is there a free program I can use to edit PDF files (mainly highlight vocabulary)?

for mac their is skim not sure if u have mac please give detailsIs there a free program I can use to edit PDF files (mainly highlight vocabulary)?
Yes, you can edit a PDF file just by using Adobe Acrobat for simple fill in the fields needs. If you want to know more, visit http://www.knowledgeisforce.com/internet/how-to-type-on-a-pdf-form.html








If you prefer not to use Acrobat however, there's is a site called pdffiller which you can upload your PDF files then edit.