It is also on the worksheets with the short cuts he handed out in class. He also explains it in the directions on moodle!
You can choose file -> export view -> change the dot into png file type -> done
You can also simply right click the image you made and select "export view". When you name the file, make sure you end it with ".png". For example, exportedproject.png would be a valid name.
I just uploaded the same thing on moodle and it changed to png itself.