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I am curious about why it would have been dropped. It is present is 7.1, 8.0, 8.2, but not in 8.5. LV 8.5 is also where the Properties dialog changed from tabs for Data Range and Format and Precision to Data Type, Data Entry, and Display Format. Maybe it got dropped by accident and it took us this long to notice?
Another scenario where this is really needed is for boolean controls. As we all know, certain mechanical actions depend on the default value (false or true) and will switch to the "other" value (true or false, resp.) temporarily. (Does everybody really know that? 🐵
In the case of a "switch until released" button, there seems to be no obvious way to change the default value (default TRUE, but FALSE while pressed down) without changing the mechanical action temporarily. This should not be necessary!
This isn't an obvious way to change the default value for switch until released, but the following sequence exploits a bug to do this (CAR #45690)
Click on the boolean control with the left and middle mouse buttons simultaneously then release them. It will change value and hold the new value (the change in value will happen if you do this while the vi is running as well).
Right-click on the control and select Data Operations->Make current value default.
Re-opening because LabVIEW NXG has been discontinued.