If you take a look in the properties (presentation tab) of the gauge in the upper left corner of this app, you’ll notice three key parameters:
- - Fill to Value
- - Cylinder Thickness = 0
- - Angle span = 180
The Fill to Value parameter shows the red segment filled until it meets its value (65% as stated in the Expression box). By setting the Cylinder Thickness to 0 you get a circle like representation of the gauge. The Angle Span = 180 creates half a circle (180 degrees) that represents 100%.
This gauge is a two layered gauge. One for the red part (65%) and one for the grey part (65 – 100%).