[Inkscape-user] Fixed line width with calligraphy-tool possible?

G'day,

the current setting of the line with with the calligraphy tool is related to the window size, so that line width changes if one zooms in or out on the screen.

Is there a way to set a fixed line width that does not change with zoom? I did not find any hints and google did not help either (which might just be me, searching for the wrong terms).

Thanks in advance

Thorsten