Please how do i add rows to the terain
From This


To this Please

Select a row a verticies (v) and go to patch - insert - ...

thanks very much sorry for being a noob

It only dose the last 2 coloms even if i usethe ctrl and lmb i m confused i select the row that i need and it dose this

here is a fix i got this morning

i used to make large brush floors, now instead i make a series of smaller ones and connect them using the "weld" feature

My first few maps were 1 solid brush about the size of a fotball field,

now I make 10 yard sections, you get much better detail when fine tuning your terrain, much smoother look.