Upload improvements - complex PDFs
We have made recently made some improvements to our upload process, to accommodate PDF uploads with more than 65,536 individual shapes in a single PDF. This is primarily caused by how PowerPoint renders high complexity backgrounds (i.e. complex patterns instead of a simple color or a bitmap / picture). We still recommend simple backgrounds for the best user experience, especially since extremely complex PDFs can still take 20-30 seconds per page to process.