a button to toggle vertical/horizontal layout somewhere

[tjauser]

I would like to have a button to toggle vertical / horizontal layout somewhere on the interface so it can be changed more rapidly

[Mathias (Author)]

You can assign a hotkey to that command and/or you can create a UserDefinedCommand that call that internal command and then put that command on the quick launch bar.
or you can add it to a button on the button panel, and you can assign a alias for the UserDefinedCommand so you just type something in the command line field that will trigger it.