What Is a Long Image
A long image stacks several photos into one tall picture — handy for sharing a sequence, screenshots or steps in a single scrollable image.
A long image is one picture made by joining several images top-to-bottom (or side-by-side), so viewers scroll through them as a single image.
It is great for step-by-step guides, chat-share screenshots, or before/after comparisons without sending many separate files.