If you assume that the term "FIELDS" means MARGINS, this begins to make sense. Printer margins are the non printable area on the paper and is a function of the specific printer and printer driver. The term margins is used in most word processor programs.
In windows, once you have finished in DETAILs mode, click on Layout. Do not click "ignore fields" on the printer setup. Make the fields (margins) big - 1.1 inches or more each for left, right, top, and bottom.
(Yes, I know most home printers will not print paper format A0, but the LAYOUT needs to be that big)
Click OK and let Valentina generate your layout.
At that point, select the File at the top left in Valentina, in the drop down menu, select "Layout", then select "Preview tiled PDF"
You will get a window that shows you page by page what would be printed on your printer (mine happens to be a Samsung M2020, which you saw in the previous screenshot). At the top right of this preview window is a printer icon. You can click that and print the whole tiled preview or print selected pages