I'm editing and cleaning up a Word file exported from a PDF, and have encountered a problem when I try to make some text bigger and bolder, which you can see here: http://i.imgur.com/iXJ0T.jpg

For some reason, a good portion of the text becomes invisible. There is a picture file of our company logo at the top of the page, but I don't think it has anything to do with this being covered up/deleted. Is there a common way to fix this?