How do i open a .pdf file to edit it?

Unless you have Acrobat Professional you will need to extract the text and edit it in a word processor. I recommend PDFTextOnline. It's easy to use, free and works from your browser.

Getting text and other content out of your PDF documents is often a hassle. Adobe Acrobat™ (or your other favorite PDF viewer) can do copy-and-paste, but that's time-consuming and tedious for anything but the smallest jobs. Acrobat™ also has a 'save as text' option, but unless you spring for Acrobat™ Professional, it often generates inaccurate text and simply cannot cope with some languages (especially Chinese, Japanese, and Korean).

It sounds like you are trying to add text to a pdf.

You can also try this free PDF editor:

http://www.pdfescape.com/

If you want to edit text in a file though, PDF edit is a good open source product for Linux, see:

http://sourceforge.net/projects/pdfedit

If you're on a mac, there is the application called Formulate Pro (it's free, despite the name / http://code.google.com/p/formulatepro) which you can use to add text to it.

Otherwise, if you happen to have Photoshop, you can import it, make changes as an image, then "print" it as a PDF using other free software like PDF creator (http://sourceforge.net/projects/pdfcreator/).

Open the document in Acrobat, pass to document>save As and choose Encapsulated Postscript for document format. click on Settings and verify the Convert all text textile to outlines selection - i don't have CS5 yet in my version it relatively is on the Transparency knocking down tab. i've got stumbled on alongside with %. preview particularly than a Tiff one works extra effective. Open this .eps document in Illustrator - the fonts will now not replace as they are outlines, nor will they be rasterised. you would be waiting to elect and delete the circle applying the Direct selection gadget.

You will need to get adobe reader to be able to edit it