You can create a subVI from an Express VI configuration. For example, you might want to save the configuration of the Write To Measurement File Express VI for use as a subVI in other VIs you build rather than reconfiguring the Express VI every time. Right-click the Express VI and select Open Front Panel from the shortcut menu to create a subVI from an Express VI.
When you create a subVI from an Express VI, the front panel of the subVI appears. You then can edit the VI and save it. To save the values entered in controls, select Edit�Make Current Values Default or right-click each control and select Data Operations�Make Current Value Default from the shortcut menu. A new subVI displayed as an expandable node replaces the Express VI on the block diagram.
After you create a VI from an Express VI, you cannot convert the subVI back into an Express VI.