For our Digital Media class, it was a requirement to have several accounts on the internet, including YouTube, Dropbox, Edmodo, and a few others depicted in a PDF attached below. We used Adobe Acrobat to create the PDF and used screenshots (command shift 3 or command shift 4 on Mac) to show that we had our accounts up and running.
For the PDF link, you might have noticed the picture was a collage depicting each of the websites in the PDF. To create this effect, I put the pictures in Adobe Photoshop and manipulated them into a collage. I also used the Rectangle Tool to create boarders on each picture.