Automatically updating the visualization of complex curves/surfaces each time a setting changes might be time consuming. So you can first change any of the settings of the following list, and then click this button to udpate the curve/surface visualization once for all.

• No. of isoparametric curves (u curves)
• No. of points (u curves)
• No. of isoparametric curves (v curves)
• No. of points (v curves)
• Show discontinuities