Hello all. Using and setting up more than one camera?

could you folks please give info. Or point me to at quick vid tutorial/tutorial info. whatever that will tell me how to set up and switch renders between more than one camera?
Thank you!
D

http://wiki.blender.org/index.php/Doc:2.6/Manual/Animation/Basics/Markers#Using_Timeline_Markers_for_switching_Multiple_Cameras

Thank you JA12 will go look it up
D