This Solution will show you how to Reorder your UDVs
From the Home screen select Tools → User Defined Variables
Select the "File Type"
With the correct File type selected, select File → Reorder Variables...
On the 'Reorder User-Defined Variables' screen, highlight the line you want to move and then use one of the Arrow keys to move up or down.
When you have finished moving the Variables select the "OK" button.