I run the sample code given in documentation to add background Image for word document using $docx -> addBackgroundImage(imagepath) however it generates a document with the default background image for demo version of php docx . Also it didn't work for CSS properite background-image: url(path) while converting from html to docx. Is it not working because I am using a demo version. And will it work if I get a premium version. Are there any limitation to it.