Byobu keybindings can be user defined in /usr/share/byobu/keybindings/
. The following are the default keybindings found in Byobu Ver. 5.125. Some key combinations might not work on some distros, Mac users beware. However, there's plenty of support and troubleshooting information available on the Web.
F2: Create a new window
F3: Move to the previous window