[Therion] How to properly scale xvi for using as a background image for drawing

[Marco Menchise]

Hello,

is there a simple way to scale .th2 scraps to make they perfectly match the
scale factor of a .xvi file used as background image in xtherion?

I want to edit a set of scraps (which are contained in a single th2 file)
while having centerline and splays as a background image. So I usually
generate the .xvi file from centerline data and load it as a background
image of the scrap in xtherion. If the scraps don't have the same scale
factor of the background I'm not able to superimpose them and edit the
drawing.

How to make they match? Should I edit .th2 files by hands and do some
calculations?

Could someone please clarifiy how Therion manages scale factor of scraps?

My scraps usually contain stations so I'm quite sure I don't have to change
the "-scale" option of the scraps.

Thanks,
Marco
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