Set Default Input/Output Units
Specify a unit system for both input and output.
- In the Project tree, right-click on Units.
 - In the dialog, specify the Units system.
 - Click the Input units tab.
 - Use the drop-down menus to specify desired units.
 - Click Output units tab.
 - Use the drop-down menu to specify desired units.
 - 
                Under Output format, choose Scientific,
                        Engineering, or Concise mix
                    numerical output format.
                Note:
With Engineering format, setting too few digits after the dot may result in zero quantity output values. For example, the number 0.0000056 specified with Engineering format and 3 digits after the dot will be displayed as 0.000. In most cases, Concise Mix is preferred.
 - Optional: Click the Set as default check box to retain your choice in future sessions.
 - Click OK.