So there's two forms of notification, one for Byobu's screen backend, and the other for Byobu's tmux backend.
The screen backend uses GNU Screen's syntax, as described in its manpage, while the tmux backend uses Tmux's syntax, as described in its manpage.
For screen, when I want to create a new keybinding, I usually open up a new terminal window outside of Byobu, and type:
$ cat >/dev/null
And then type some key combination, for instance Ctrl-Shift-F7, and you should see on the screen:
That's the key code that you would need to put into your
You'll use the
bindkey command, and you'll want to bind that to one or more commands, as described in the screen manpage.
For tmux, the syntax is way easier! Here, you can just use "S" for Shift, "C" for Ctrl, "M" for Alt, etc. Once again, it's described pretty thoroughly in the tmux manpage.