Use the Break menu on the optional view window as follows:

  Action           Function
  ------           --------

  On Exception     Breaks on any exception signaled
                   during program execution.

  Activate All     Activates any previously set
                   breakpoints.

  Deactivate All   Deactivates any previously set
                   breakpoints.

  Cancel All...    Removes all breakpoints from the
                   debugger's breakpoint list and
                   from the breakpoint view.

  Toggle           Toggles an individual breakpoint.

  Set/Modify...    Sets or modifies an individual breakpoint.

  Cancel           Removes an individual breakpoint.