Exercise modal—can you enlarge it for more drawing space, and blur course in the background for focus?

Hi Khan Academy! Just writing on my favorite part of the website: exercise platform! In the long run, can you consider increasing the modal size to enable more drawing space?

KA scratchpad is the best of its kind, and Schoolhouse.world certifications extensively use KA. This matters to your goal of connecting mastery to opportunity, so I'd love to see the exercise modal get a little more space.

In doing so, you can also blur out (or color dark) the course page when attempting a practice activity—this brings back the old Missions feel of deep focus on practice. Both these suggestions are for the long run, as you improve the exercise platform.

Finally, is there a reason for enabling both modal and direct interface for exercises, but modal-only for Unit Tests and Course Challenges? I'm guessing it is to ensure that students and teachers know which course a test is from, and to put practice in the context of the unit structure.