It is necessary to obtain a PDF editor to modify the PDF file in order to add a picture to an Adobe Reader presentation. For this purpose, you can visit the database of Software Informer where you can find such software. Browse the list and pick one application that you can use to modify the PDF files. The editing process is actually very simply. Download and install the application then open the file and go to Insert > Image and select the image on your hard disk. This is the easiest way to add images to PDF files.