Here you can find the Cloudprinter.com guidelines for production PDFs
Which PDF version should you use? It often depends on your content. To figure it out easily we created a helpful list with recommendations for each product category which will guide you to set up the file successfully.
Please use this link to find recommendations on color, layers, and other prime aspects of this process.
Also, you can click right here on the product group and jump directly to the guidelines:
If you are not that familiar with the structure of a PDF file, then we will recommend you to take a look at this article's PDF page boxes explained which will guide you through the structure and explain the purpose of each box.