You draw when you are placing lines and points to create a form. You can draw on the following elements:
3D levels and 3D reference planes are automatically detected. They highlight in the drawing area as the cursor moves over them. Click to select one of these to set it as the active work plane.
Several options become available on the Options Bar. You can set the placement plane, create a surface by drawing closed profiles, draw a chain of lines, and set an offset or radius value.