Illustrate the process of converting a scanned image into a PDF file using a free online tool, emphasizing the benefits of digital archiving and sharing.

Design a visual tutorial on how to turn a graphic design into a PDF document, highlighting the importance of file format compatibility and quality preservation.

Create a step-by-step guide on how to convert a digital image into a PDF file using Adobe Photoshop, including screenshots and detailed instructions on saving and exporting the file.