Hi luigicarlini ,
Thanks for your question.
Anyway, it has nothing to do with the previous question, sorry.
@kidsformal's problem was that the Name of the products was not shown in Stock Central.
On the other hand, you're asking for columns showing your custom attributes values. Unfortunately, this is not possible, sorry. It would be possible and not too complicated (if you are comfortable with programming or if you hire a good developer) to add these columns using the large number of hooks included within the code.
Best Regards,
José Andrés