3D Splines Create splines in 3D sketches or use 3D sketch planes. Video: Spline in 3D Sketch Video: 2D Sketch on a 3D Sketch Plane Contents Creating 3D Splines Editing 3D Splines With some exceptions, such as the Z Coordinate , editing 3D splines is similar to editing 2D splines. 3D Spline PropertyManager The 3D Spline PropertyManager controls the properties of a sketched 3D spline. Parent topic3D Sketching Relations with Splines 3D Sketching Tools Dimensions in 3D Sketches 3D Sketch Plane PropertyManager