Nothing easier, by default the 
                    Content Map
                    This section describes how to set up your content maps and use Content Area
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                     are created with an opaque background.
                      To have a transparent background on your content maps, just go inside their 
                    Element Tree
                    The hierarchical structure of Smode elements
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                    , select the root of the content map check the "alpha layer" box into it's parameters:
                    
