It would be great to be able to add writing to the diagrams in the study sets- I was able to quickly add photos from power points into the "add image" mode with the three icons at the top of the page but after making a bunch of flashcards realized that when I clicked the pen icon the diagram disappeared and I couldn't get it back! It would be more efficient to write on the diagram versus having to upload a photo from the camera roll to write on it. It would be nice to be able to write on the added diagram in order to blur out areas to test a specific part of the diagram.