Tip - Flip Between Open InDesign Documents from the Keyboard

Nick from the UK asked, I?m often working with several InDesign documents open ?. How can I quickly and easily shuttle between them without having them each tiled on my screen? I have a feeling you are going to say it?s a customised keyboard shortcut, but having printed out the list as you advised in an early podcast, I just can?t seem to see it. There's an OS keyboard command for flipping through open docs in any current program ... not an InDesign-specific one.