The SK8 Project Builder was created to provide a rich set of direct manipulation tools, including tools for building interactive controls and general but non-invasive glueing. The builder's objective was to provide a visual/direct manipulation interface for building visual development environments. That is, the system could be used to develop completely different development environments tailored to different tasks. The first version of the SK8 graphics system was designed to extend HyperCard, allowing cards to have multiple layers rather than a single "background" template.