The size limit is 12mb per JPG or PNG file and 25mb per PDF file. Crowdmark accepts PDF, JPG, and PNG files.Read the Preparing images for submission section of this page to make sure your work is easy to read and ready to submit. Make sure that each answer is clearly labelled with the question number. In Crowdmark, each question has its own upload area so it’s best to complete each question on a separate page or crop out each question later. Write your answer on paper, in Word, Google Docs, or a note-taking app (unless your instructor has specified otherwise).