We are using PdfViewer and its command descriptor.
Right now, I don't find how to set the name of the file being saved. In my humble opinion, the command parameter should be the fileName of the PDF being exported.
The documentation doesn't tell how to set the fileName which is a basic thing to do for a save file command.
I didn't find a solution in the forum. Weird nobody ever talked about it.
Thanks for evaluating this feedback