Hello i've download a few apps for my new ipad mini that allows me to edit pdf files. I download Documents 5, Pdf , Pdf Pro,... The problems of this apps are that i don't knwo where editted files are stored on my ipad. I would like to edit them(underline, ...) and them upload to my drop or similar. also i don't fuind in the app the method to delete wht you write on your pdf. sometimes you underline a word and you want to delete the underline. How can i do that? do you any app for my ebooks files in my ebook?somes are underline.