Adding an image to a PDF can be straightforward with the right tools. Programs like Adobe Acrobat or online services such as Smallpdf allow you to insert images into existing PDFs. Generally, you'll open the PDF, select the option to add an image, and then place it where you want. Have you tried any specific tools yet, or is there a particular PDF you’re working on? I'd love to help you with any steps you're finding tricky!