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scrolling inside screen

I love screen, I use it for everything (remote session, slime.vim). But sometimes I hate it. I can't scroll! Well, no that is not true. I didn't know how to scroll.

First you have to turn on the buffer. Create a .screenrc in your home directory with the following content: 

# define a bigger scrollback, default is 100 lines
defscrollback 10000


You can access the scrollback buffer by entering "copy mode", which is accomplished by typing
C-a ESC


Here is the full explanation.

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