In addition to importing item shapes or downloading them from Tekla Warehouse , you can create shapes using existing geometry and parts in Tekla Structures models. For example, you can create a shape using a single part or several parts that have been attached to each other.
The part reference point that has the yellow handle determines the origin of the shape. The positive global x direction determines the direction of the shape. Later on when you create items using the shape, the shape origin and direction will align with the yellow and magenta item handles.