Found this list I’ve compiled some time ago. It might be useful to someone:

General

screen                 - start a session
screen -S name         - start a session with a certain name
screen -ls             - list available sessions
screen -r name         - reattach to screen session
screen -x name         - attaches to a session in use (not detached)
                       - content will be displayed on both ends
C-a :sessioname [name]    - change session name

C-a d                 - decouple from screen
C-a C-\            - kill screen and all processes under it

Window Management

C-a c        - create window
C-a A        - change window name
C-a K        - kill the window
C-a C        - clear the screen

Navigation

C-a “        - get list of windows
C-a SPACE    - toggle between windows (alt-tab)
C-a n        - next window
C-a p        - previous window
C-a [x]        - go to window [x]
C-a N        - Show the number (and title) of the current window.

Editing

C-a [        - copy mode
C-a ]         - paste

Monitoring

C-a _        - start monitoring
C-a M        - stop monitoring

Regions

C-a S        - split screen (a session will have to be picked for the bottom region C-a “)
C-a TAB    - switch between regions
C-a Q        - quit split screen - current region’s window is used
C-a [x]        - display window [x] in the current region
C-a c        - create a new window in the current region

Multiuser

C-a :multiuser on        - turn multiuser on
C-a :aclchg paul +r "#"    - give user paul read access to this session (all windows)
C-a :acldel paul        - remove all permission for user paul
screen -e john/        - user paul can connect to john’s session

$HOME/.screenrc

vbell_msg “beep”            - change the visual bell
bing ‘R’ screen ssh paul@test    - bind C-a R to ‘open new window with a shell to test’
screen N ssh paul@test        - create window N at startup with a shell to test

hardstatus on
hardstatus alwayslastline        - status line as the last line of the window
hardstatus string “%w=%m/%d %c”     - status line example (see “String escapes” manual pages)

attrcolor b "R"            - display bold text red
attrcolor u "-u b"            - display underlined text bold