I am using a template on overleaf (https://www.overleaf.com/latex/templates/d-and-d-5e-latex-template/vmfdkjfhfynv) and I wrote the entire document. I had created a png file, with the same size of a page, to put on the cover, but I can't.
The picture is inserted within the page a yet consider the margin, so the image stand dislocated from the upper left corner. I had created a .pdf with the image but the same problem appears. For those examples I used changepage, pdfpages packages and I wrote within the environment titlepage.
I couldn't find any other question that assembles with this one. I want to put a png file into the first page of the document ignoring margins and other things that this template automatically puts on the page.