To use the pop-up menu in the monitor view, position your mouse pointer
  in the monitor view, and press MB3.

  A pop-up menu with the following items appears:

  Expand                 Expand a monitored aggregate to show its members.

  Collapse               Collapse an expanded aggregate.

  Toggle Watchpoint      Activates or deactivates a selected watchpoint.

  Typecast ->            Provides the list of type choices for modifying values.

  Change Radix ->        Provides the list of radix choices for modifying values.

  Remove                 Remove the selected expression from the monitor
                         list of the monitor view.

  Step                   Step to next line, stepping over routine calls.

  Go                     Resume execution of program.