A pdf is a very handy type of document, which as you have already seen is very easily inserted in your school’s courses. In some learning activities you might wish to enrich your learners’ knowledge with material which they check on their own time and rhythm. So, why not letting them download or print the shared pdf? On the other hand, if you are going to upload original material made by you, you might prefer to protect it.
Just go to your Settings and select Data Protection. There you can handle your pdf protection by deciding whether your pdf will be downloadable, printable or both.
In case you select those two options your students will be able to find the relevant buttons on their course player.
Otherwise, if you prefer keeping your data protected just leave the boxes unchecked and these 2 icons will disappear from your course player ensuring that your pdf file cannot be shared.
If you want to refresh your memory on how to upload your pdf as learning activity check the respective article here