As you can see in the screenshot, I am trying to define an attribute for a block that should show me the Z-axis value.

And that works just fine. The only thing is that I cannot define the accuracy (I have always the format i.e. 300.450000) and also I can't change the seperator. The options are there in the window (format options) but the are grey and cannot be changed. Any idea why that is?

I would highly appreciate your help. Thank you.