3D Import Z Scale

Ive watched all the videos but they appear to be made with an older version of the tool.

How do you use the Z Scale in the 3D Import tool. How do you use Scale Height.

Also why does the Apply always turn off the Show 3D. Is this how it is supposed to work? It is very annoying.

There is also no place to choose the material for the Show 3D as it showed in the tutorial.

Please see:

Basically if you want the object to come in at the same size it was generated at, set Z scale to 1.0 — if you want it half the height, use 0.5, twice, 2.0