Hi Massimo,

re:
> How can I avoid dimensions and texts to scale up and down when I zoom in and out the window?

Currently the text is designed to be an annotation that stays the same size on screen no matter what the current zoom level.

There isn't a way to change that right now but I do plan on making an option for model-size dependent text that scales like model geometry.

I will also probably do some additional refinement of the current scale-independent method to allow them to shrink if you are zoomed out a lot. I'm not sure if this refinement will make it in to v4 or not though.

- Michael