I am using Scribus 1.5.5 in Mac Catalina.
When I insert ISBN barcode to the book cover in Scribus Insert>Barcode>Point of Sale>ISBN, then the ISBN numbers are not visible, should it be so ( the box before "show readable text" is ticked)?
I want to send the pdf x-1a file to the printshop. Does the printshop add the numbers to the cover automatically where the barcode is placed or how does it work?
Should the "show readable text" box be checked and when should the "Guard whitespace" box be checked?