Hi,
I've encountered a problem with showPrintAreaEnabled=true in Print Widget. It seems to render a correctly sized canvas only with 96dpi. Changing e.g. to 300dpi enlarges the printarea canvas. I think that's not the intended behaviour.
You can check that out in the samples: https://developers.arcgis.com/javascript/latest/sample-code/widgets-print/
gdi-hohenlohekreis.de