Stop Exporting The Viewport: How Zoomed Image Editors Map Back To Original Pixels

One of the easiest ways to break an image editor is to confuse the viewport with the image. The screen needs zooming, centering, and a comfortable interaction scale. The exported file needs exact source-pixel geometry. If those two layers get mixed together, the UI might look fine while the saved result is wrong. That boundary shows up in tools such as crop editors, screenshot redactors, and browser-side markup tools. The full companion guide is here: https://happyimg.com/guides/how-zoomed-image