Copy and Paste on GNU Screen

So recently I finally found out how to do copy and paste on gnu screen, previously I just do a drag on a mouse.

So copy and paste on gnu screen,
– ctrl-a [ 
– move to the first character of the string to copy, press enter
– move to the last character of the string to copy, press enter
– now to paste, press ctrl-a ]
p.s kina ashamed that it take me so long to figure out =.=