I'm not sure if I understand your question right.
You can edit your gauge's display properties, set "background style" to "Transparent".
Put the gauge over your tank, right click the gauge, select Arrange->Move to Front. Resize the gauge to match the size of the tank.
Then, you get the impression of a water level inside a tank.
Message Edited by Ryan.S on 02-08-2007 11:52 PM
Ryan Shi
National Instruments