In this video, I share how to download a PDF from Schoology using an iPad running iOS 13. We mark up the PDF in Files and submit it. During our testing, we discovered that some teachers do not see the mark up in their preview. When they download the submitted assignment, the mark up is there. Our team is reporting this to schoology and hope it will not be a problem for long. We'll See. A work around is to take a screenshot and upload it after marking it up.