Creating 3D Splines To create a spline in a 3D sketch: Click 3D Sketch (Sketch toolbar) or Insert > 3D Sketch. Click Spline (Sketch toolbar) or Tools > Sketch Entities > Spline. Click to place the first spline point, then drag to sketch the spline.The Spline PropertyManager appears.Each time you release the left button, a new 3D origin is created: To change planes , press Tab. Continue to place spline points and change planes if necessary. When the spline is complete, double-click to stop sketching. Parent topic3D Splines Editing 3D Splines 3D Spline PropertyManager Dimensions in 3D Sketches Relations with Splines Creating Multiple Point Splines Creating Two-Point Splines with Tangency