I create new report as a Certificate and I added the attribute that I want to print in the PDF file, but I want to add more layout to make the design more professional, but there's no sources about that on the YouTube like add more (colors, font style, spacing, text-align).

I also want to know if I can add a ready design template and add my attribute to it, and if there's more information about Qweb because the documentation not provide every things 

need to know more about "t-options".