No valuebox when using a horizontal linear gauge?

[spiff72]

I have been tinkering with this for several hours trying to understand why my valuebox disappears when I configure a horizontal linear gauge.

I just realized after looking at the example documentation that all of the horizontal linear gauges don't show a valuebox either. Is this an inherent property of a horizontal linear gauge? Is there any way that a valuebox can be implemented on horizontal linear gauges?