Hello Carsten,
you can force any variable by using what is describe into this FAQ:
How can I define the units and precision for a single label?
depending on which version of the software you use, you can modify the plate name in the "Management Tool" or in the "Graitec Advance Manager" in the default, type down "plate" under "drawing general" you should be able to find "Folded beam/Plate Name" where you can apply what is describe in the FAQ.
Regards,