tru64 ES40 GRAPHICS_CONTROLLER resolution settings

Hello
I have a resolution problem when I run SMOR on our ES40 running TRU64 version 5.1A.

I cannot view the entire screen and the menu options.  This is difficult as I need to configure new drives this evening:

When I run a /sbin/hwmgr get attribute -category graphics_controller   I get the output below:
I believe I need to change the X_resolution to 1024 and the Y_resolution to 768 (these match another identical system where I can view the entire SMOR menu).

The options are not 'settable'...  I require instruction on how to set these resolution options?

Thanks
Jane
>>>OUTPUT OF HWMGR>>>>
name = vga0                                                                   
  category = graphics_controller                                                
  sub_category = 2D                                                             
  model = Generic VGA                                                           
  power_mgmt_capable = 0                                                        
  video_memory_size = unknown                                                   
  num_planes = 8                                                                
  num_colors = 256                                                              
  X_resolution = 640                                                            
  Y_resolution = 480                                                            
  registration_time = Thu May 10 07:08:48 2007                                  
  user_name = (null) (settable)                                                 
  location = (null) (settable)                                                  
  software_module = (null)                                                      
  state = available                                                             
  state_previous = unknown                                                      
  state_change_time = none                                                      
  event_count = 0                                                               
  last_event_time = none                                                        
  access_state = online                                                         
  access_state_change_time = none 
capabilities = 0                                                              
  indicted = 0                                                                  
  indicted_probability = (null)                                                 
  indicted_urgency = (null)                                                     
  disabled = 0         

Jane Caldwell-Myers
Computing & Telecommunications
Laurentian University
705 675-1151 ext 2150