5a. You may also want to preserve an overlay image while the others are zoomed -- similar to using the "image_preserve" on the base/background images. In this case, however, the whole overlay image is displayed. The default (when not using the "overlay_zoom" parameter is to always zoom overlays with the rest of the images.
We'll also add in the "quiet_reload" parameter so you can see the effect of reloading the display this way. The format is:
Here's the example -- "active_zoom" is set, so just click to zoom...
(thanks to the NWS for providing a few images for this example!)
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If you would like more information, or have questions or suggestions, please contact Tom Whittaker