Keyboard shortcut to switch between panes?

Is there a way to switch between panes with the keyboard? I tried using ‘tab’ but that shifted the focus from the main pane to the document toolbar where the back and forward buttons are. Thanks for the consideration!

In the Three Pane view, control-tab and shift-control-tab will cycle forward and back in the group pane, document pane, document, and tag bar (if visible).

Mucho gracias Greg!!