Byobu/Tmux:
#Show help
Shift + F1
#Create new window
F2
#Close current window
Ctrl + D
#Create a Horizontal split
Shift + F2
#Create a Vertical split
Ctrl + F2
#Move a split
Ctrl + F3 or F4
#Move a window
Ctrl + Shift + F3 or F4
#Change status bar colour
Ctrl + Shift + F5
#Detach session and logout
F6
#Detach session and dont log out
Shift + F6
#Kill split in focus
Ctrl + F6
#Join all splits
Shift + F5
#Kill the current window
Ctrl + A + K
#Move focus to next split
Shift + F3