I am trying to modify the popup window to have a fully transparent box and only show the image specified in the popup config file and the close button.
I have tried to insert alpha="0" and contentBackgroundAlpha="0" but have only succeeded in making the image itself disappear, not the popup window.
Where do I need to look to set the transparency/color for the popup window. I know it is inherited from the main config but I want to keep the colors as they are for the rest of the viewer. Ideally I would only be implementing this transparent popup window for one popup, but keep other popups as already formatted, if that's possible.