Set - Control Points (Show points) number

 From:  Paul (WWWPAUL)
6677.1 
Is it possible by any chance to set the amount of the Control Points (Show points) on a surface.
I attached an example. In my opinion, the shown points are too much, and this is very difficult, and require a lot of time to manipulate the surface. I'd like to have the option to set the number of points. (20 points for example) Is that possible ?
Thank you.