I don't see why the source of the pdf would manner but I definately used it on a non editable one I would normally have to use draw or such for. it has 3 nice easy options. text box, draw, and insert image. both the first two you can choose the color. The text type and size matched my doc pretty well but im not sure if that is hapenstance or if it actually detects it and figures out a default per doc to be pretty close. Im really hoping its the latter. EDITED - one big thing of note is the text box does not overwrite the backgroud so any lines in the doc stay normal. many things I use end up pushing out the line which you then have to remove and use underline on your text which never looks right with the rest of the doc.