To manually set a dmx channel or group of channels to a specific value:
Open the DMX Output window (press SETUP on the front panel and select the button on the main toolbar)
Use the drop down menus at the top of the DMX Output window to select a processor and universe.
Double click on the desired dmx channel cell in the spreadsheet (or highlight a group of dmx channel cells and press set)
Enter a valid dmx value (0 thru 255)
Press Enter to confirm (the value will now be displayed in blue)