Save All Solutions Progress is only stored in this browser, so if you want to move all of your progress to another machine, you can do so using this button. To save a single question's solution, use the Save button on the exercise page.  ~  Load Saved Solutions Loads a file previously saved with "Save All Solutions", restoring all of your solutions at once. This is helpful if you want to move all of your work to a new machine.  ~  Dark Mode