If you are displaying the Set/Modify Breakpoint dialog box from the
  Set...  menu item in the Break menu on the main or instruction window,
  use the Set/Modify Breakpoint dialog box to SET a conditional
  breakpoint or an action breakpoint.

  If you are displaying the Set/Modify Breakpoint dialog box from the
  Set/Modify...  menu item in the Break menu on the optional view window
  use the Set/Modify Breakpoint dialog box to SET OR MODIFY a conditional
  breakpoint or an action breakpoint.

  When the Set/Modify Breakpoint dialog box appears, complete the fields
  as follows:

     Field                     Action
     -----                     ------

  Location field             If the dialog box does not display the
                             location of the breakpoint you are
                             setting or modifying, enter the location
                             using one of the following forms:

                             <routine-name>\%line <line-number>
                             routine <routine-name>
                             <numeric-address>

  Condition field            Optionally, enter a condition or edit
                             an existing condition.  The relational
                             expression must be valid in the
                             source language of the program module.

  Action field               Optionally, enter an action or edit
                             an existing action by substituting
                             one or more new debugger commands
                             (separated by a semi-colon).

  Activate/Deactivate        Optionally, activate a deactivated
    Breakpoint button        breakpoint by accepting the default,
                             or deactivate an activated breakpoint
                             by toggling this button.

  OK button                  Click on OK to set the breakpoint
                             and dismiss the dialog box.

  Apply button               Click on Apply to set the breakpoint
                             and clear the dialog box.

  Cancel Breakpoint          Click on Cancel Breakpoint to remove
    button                   a breakpoint. Note that you can no longer
                             reactivate this breakpoint unless you
                             again explicitly set it.

  Cancel button              Click on Cancel to dismiss the dialog
                             box.

  Help button                Click on Help to display this help
                             information.