All graphics display in Tina is done via the Tv Tool, each application tool that has graphics display in the Tina system has associated Tv Tool's. The Tv Tool is resizeable, either by dragging at the corners of the tool or via use of the "Size" menu. 3D graphics can be displayed either with orthographic or perspective projection as required ("Proj" menu). Data can also be inverted by a 180 degree rotation in either 2D or 3D. During data manipulation (eg rotation) only a subset or "skeleton" of the entire data structure may be displayed. This is purely for convenience and the entire data set will be fully displayed at the end of the interaction.