Ellie Warmingham reflects on the process of designing a magazine cover. She started with a simple cartoon-like background and white borders. She added a title using the "Neon" font and cartoon/3D characters. For the final design, she changed the background to blue instead of green with trees. The character positions changed as she added different platforms for them to stand on. The process involved adding placeholder boxes and images, then text. She adjusted backgrounds and layouts to improve the overall design.