Adding points to a surface, only one direction?

[rdane1010]

I am learning rhino coming from other nurbs software and am a bit perplexed

by how to add points to a surface. I have found the tool that allows you

to add points which basically adds a horizontal line with a few points to

a surface.. however I can't figure out how to add more points along this

horizontal line.. it just has its set number based off the surface.. is there

a way to do a perpendicular "add points" to go in the other direction or

to add more points to that horizontal line?

 

I hope I am making sense, for horizontal I mean if it is a lofted surface

made of 2 end curves that are oriented vertically (as I realize it wouldn't

always be horizontal).

 

thanks for any help so I can get this figured out.