See also the Next Button, the Cancel Button and the Finished Button.

What does it do?

The back button is used to move the wizard to the previous step. Typically this will mean a move back to an input display or to the previous step of execution in the main task.

What if the back button doesn't seem to work?

If the back button is not enabled (that is, it appears "ghosted", and will not respond to mouse clicks) than it means one of two things;