[b]Check Out Conic Sections![/b][br][br][list][br][*]Check or Clear "Show Axes" to set visibility of x, y, and z axes[br][/*][*]Adjust Cutting Plane using Tilt (angle), Shift (left/right), and Height (up/down) sliders[br][/*][*]"Reset View" to restore default viewpoint and stop motion[br][/*][*]"Reset Plane" to restore cutting plane to starting orientation[br][/*][*]"Tilt Plane to Slant of Cone" sets plane tangent to cone edge (then adjust Shift or Height for true parabola)[br][/*][*]"View Above Section" sets view directly above (perpendicular to) section[br][/*][*]"Spin It!" to automatically revolve view around the z-axis[br][/*][*]"Stop" to stop revolving[br][/*][*]"Projection Type" button (4th) in 3D view to select 3D glasses[/*][/list][br][br]You can also manipulate the 3D view by [b]Right-Click-Dragging[/b]