Mixer at Night wallpaper — a DJ mixer with faders and knobs in blue club light
Open display · the wallpaper itself
Mixer at Night — simulated reframe of the same wallpaper on the closed Duo cover display
Closed display · reframe preview

One file, set once. This preview is cropped from the exact file above. Your Duo reframes that one wallpaper when it closes — there is no second file. You position the crop in the wallpaper editor, so yours may sit a little differently.