Detect when an exam has too little space
Determining how much space an answer requires is exclusively an instructor's responsibility, and there's little that zesje can do.
We can however determine whether students systematically run out of space and provide a feedback to the instructors saying e.g. "in problem 5b 90% of the students used the complete space available, consider using larger answer boxes next time."
(originated based on student feedback in a discussion with @wdiepeveen)