Hi. I'm an apple product user since 1983 (that's right, pre-Mac). It's been fun over the years updating to each new generation of technology. My most recent acquisition is a 3rd gen iPad after passing on my gen 1 to my daughter. I'm hoping I can get some advice on finding an ipad app that will allow me to edit PDF files that include images that have been scanned crookedly. I'd like to be able to straighten the images, usually by less than 15Â°. The files I have trouble with are musical scores. Any help in finding such an app would be greatly appreciated. Cheers.