The ZoomViewer gadget is enabled by default for all users, whether logged in or not. Registered users can disable it by unchecking it in their preferences (Gadgets->Improved navigation).
- Glacier pano 480MP
- Hong Kong Skyline 94MP
- Chicago Skyline 117MP
- Geological Map of Minnesota 250MP
- NGC 6357 149MP
- Denver Airport 111MP
Those examples above have all already been preprocessed. When you try to view an image for the first time it has to be fetched from commons and transformed into a zoomable image. This has to be done only once for each image (the result is then cached). The preprocessing can take up to 2 minutes. A status is displayed along with a little spinner. In some cases (for very large images) a page reload can be necessary. For even larger images the preprocessing program may exceed allowed memory consumption on the toolserver. Those images can be processed manually (leave a note on the discussion page).