This option was disabled to simplify use of port forwarding.
You can enable it and pass "-s none" to ssh.
startup_message off
# Use backtick instead of Ctrl+A.
escape ``
term xterm-256color
shell bash
# If a window goes unresponsive, don't block the whole session waiting for it.
nonblock on
# Window numbering starts at 1, not 0.
bind c screen 1
bind 0 select 10
# Define a bigger scrollback, default is 100 lines.
defscrollback 10000
vbell on
# Ctrl+Tab and Ctrl+Shift+Tab to switch session in GNU Screen.
bindkey "^[[1;5I" next
bindkey "^[[1;6I" prev