I remember that a precedent version of Website Maker allowed setting the transparency of an object by the ‘Properties’ panel, but now this setting is not available. How can I set the transparency of an object in my webpage now? I specify I am using the free version of Website Maker. Thank for your answer.
As far as I can see, this is really not a feature in the free version of Website Maker. See also the following comparison chart under "6 Object properties":