There is a translation error in the USA English trial edition of Video Pro X 19.0.1.98 (UDC2). "Effects" → "Size/Position/Rotation" → "Size" says "Originalgröße" instead of "Original size."
These "translation" errors (or perhaps, more correctly, these "non-translation" errors) are something which has plagued a number of Magix programs over the years. I'm pretty sure that, as you delve deeper, you will find more!
I think that those of us who are long-time users of the software have almost come to expect some in each new release! Not ideal, yes; annoying, most definitely yes!
Please note that you are a couple of patches behind with your Trial program. Latest is 19.0.1.106 but I am not sure if the error you report is fixed in the latest patched version.