I just tested and i think there is a problem.
I set the slider to 0 and the thickness is too large.
Unfortunately, that’s how it is by design. The matter has been raised before, in the following threads and elsewhere.
Yes, it seems to me the minimum frame width should be about half as thick as what I see in this example. Less than that would become non-useful (i.e. just remove the frame).
Yes the 0 is much too large and half would be fine
And then between 0 and 5 it doesn’t move.