Split Screen on vi terminal

Sometimes we need to open multiple files even though we are aware of diff and many other ways of file comparison . We can open two or more files in split windows for comparison.

we will open two files in same terminal window..

open first file normally as we do 

$ vi first.txt

for opening second file in same vi display type 

$ :new second.txt

to navigate in between the windows use

ctrl + w

j     (move to lower window)

or

ctrl + w

k   (move to upper window)

for expanding a split window to full big screen 

:only

you can also open a new file by just typing 

:new 

if file opened by :new is now named , you wont be able to save it with just 

:wq 

instead u have to give 

:wq nameForNewFile.txt

Keep giving comments .. :)