Scroll within ssh screen terminal

Screen has a scrollback buffer but it cannot be controlled through mouse. Pressing CTRL +A and then ESC enables “Copy mode” in which you can move with cursors and PgUp/PgDown keys. Pressing ESC again ends copy mode.

CTRL+A ESC

Inspired by https://unix.stackexchange.com/questions/454398/how-to-scroll-inside-a-screen-session-of-an-ssh-connection