Question: How do I change the size of Visualization

How do I change the dimension of the Visualization?

Imagine a simple pendulum

:

In the construction mode it looks like this:

But if I change the length of the RBF from 1 meter to 1cm it looks like this:

In the playback mode it looks a little bit better. But still I don't know how to control the size.

For the geometry objects it seems, that the dimensions are in meters:

This is ok, but I would expect units. Something like this:

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