Nowadays interactive installations and public displays have become part of our daily lives, for example in retail stores, at bus and train stations as well as in museums. The content which is shown on this displays is often created at a desktop computer and then remotely deployed on a target device. Content which may appear well optimized on the desktop display may look maladjusted in the target environment. By providing a mobile editor component to optimize the adaptation on-site, content can be created faster and in a higher quality whereby the content is optimally fitting the specific target environment. In this thesis VEII (Visual Editor for Interactive Installations) is presented - a toolkit which combines the features of a content management system and a content composing tool with a platform which enables non technical experts to create smart environments, extended by a component to adapt content on-site while getting immediate feedback from the target display. Furthermore, the toolkit enables users to create interactivity using sensors without any technical expertise by providing behavior rules. Users can adapt the rules within a text-based story where easy understandable UI elements are embedded that represent important parameters of the actual implementation.