How to add sections?

How do i add more sections? (along the y axis)
I used splines then extruded
I want to add more sections so ill have enough vertices to shpae it to the wing template (LT.Green shape top veiw)
I did it earlier today but i dont know how i did it

I used splines then extruded
I want to add more sections so ill have enough vertices to shpae it to the wing template (LT.Green shape top veiw)
I did it earlier today but i dont know how i did it
