Property button / Property table as a numeric input widget?

I was missing the ability to enter a numeric value to forward to the device.
Apparently the new widgets Property button / Property table seem to fill that lacking function.

While the property button looks fine, I could not finalize the parametrization of the property table.

The property pattern is greyed out and the OK button is inactive.

Have you got some documentation on what is required?

Anyhow i am very pleased that this control widget is now closing that gap.
Thank you for that.