* usr/share/byobu/profiles/tmux, usr/share/doc/byobu/help.tmux.txt:

- Alt-F11 breaks split into new window
  - Shift-F11 puts window into a horizontal split in previous window
  - Ctrl-F11 puts window into a vertical split in previous window

debian/changelog

@@ -17,6 +17,10 @@ byobu (4.47) unreleased; urgency=low
   * usr/share/byobu/profiles/tmux:
     - rearrange to match help text;  would be good to keep these
       coordinated
+  * usr/share/byobu/profiles/tmux, usr/share/doc/byobu/help.tmux.txt:
+    - Alt-F11 breaks split into new window
+    - Shift-F11 puts window into a horizontal split in previous window
+    - Ctrl-F11 puts window into a vertical split in previous window
 
  -- Dustin Kirkland <kirkland@ubuntu.com>  Tue, 08 Nov 2011 19:16:15 -0600
 

usr/share/byobu/profiles/tmux

@@ -34,6 +34,7 @@ source /usr/share/tmux/screen-keys.conf
 set -g prefix ^A,F12
 
 # Byobu's Keybindings
+# Documented in: /usr/share/doc/byobu/help.tmux.txt
 bind-key -n F1 new-window -k -n config byobu-config
 bind-key -n S-F1 new-window -k -n help 'sensible-pager /usr/share/doc/byobu/help.tmux.txt'
 bind-key -n F2 new-window
@@ -69,7 +70,9 @@ bind-key -n M-NPage copy-mode \; send-keys NPage
 bind-key -n M-PPage copy-mode \; send-keys PPage
 bind-key -n F8 command-prompt -p "(rename-window)" "rename-window %%"
 bind-key -n F9 new-window -k -n config byobu-config
-bind-key -n S-F11 break-pane
+bind-key -n M-F11 break-pane
+bind-key -n C-F11 join-pane -h -s :. -t :-1
+bind-key -n S-F11 join-pane -v -s :. -t :-1
 
 set-option -g set-titles on
 set-option -g set-titles-string '#(whoami)@#H - byobu (#S)'

usr/share/doc/byobu/help.tmux.txt

@@ -27,5 +27,7 @@ and some convenient keybindings:
   F9				Launch byobu-config window
   F10				* Used by X11
   F11				* Used by X11
-    Shift-F11			Expand split to a full window
+    Alt-F11			Expand split to a full window
+    Ctrl-F11			Join window into a vertical split
+    Shift-F11			Join window into a horizontal split
   F12				Escape sequence