When you open a new part document, first you create a sketch. The sketch is the basis for a 3D model. You can create a sketch on any of the default planes (Front Plane, Top Plane, and Right Plane), or a created plane.

You can start by selecting:
  • Sketch entity tools (line, circle, and so on)
  • Sketch tool
  • Planes
  • Extruded Boss/Base Tool_Extruded_Boss_Base_Features.gif or Revolved Boss/Base Tool_Revolved_Boss_Base_Features.gif on the Features toolbar.
You can also create a sketch on a flat surface, a spline on a surface, or the face of a solid.