To create elements or edit their profiles in Revit, you must first create sketch objects. Examples of elements that require sketches include:
Sketches are also required to define other types of geometry, such as:
In the Revit Platform API, sketch functions are represented by 2D and 3D sketch classes such as the following:
In addition to Sketch Elements, ModelCurve is also described in this chapter. For more details about Element Classification, see Elements Classification in the Elements Essential section.